has not been able to drive; Fatigue; got light headed when blood pressure dropped; tremendous headache; Chest tightness; could barely walk; her thyroid was slightly elevated; she was marked positive for  ANA, the result for inflammation; she was not feeling well; Bradycardia; Passed out; Dizziness; tremendous back pain; Low blood pressure; This is a spontaneous report received from contactable reporter(s) (Consumer or other non HCP), Program ID:. The reporter is the parent.  A 23-year-old female patient received BNT162b2 (BNT162B2), on 11Feb2022 at 14:00 as dose 3, (booster), 0.3 ml single (Lot number: 30135BA) at the age of 23 years, in left arm for covid-19 immunisation. The patient's relevant medical history included: "COVID", start date: 2020 (unspecified if ongoing), notes: She has had COVID twice, she had it in 2020 and had it in Nov2021.; "migraine sufferer" (unspecified if ongoing). The patient's concomitant medications were not reported. Vaccination history included: Bnt162b2 (Dose: 1), administration date: Dec2020, when the patient was 22 years old, for COVID-19 immunization; Bnt162b2 (Dose: 2), administration date: Jan2021, when the patient was 22 years old, for COVID-19 immunization, reaction(s): "patient was positive with Covid", "patient was positive with Covid", "Acid reflux"; Flu shot, reaction(s): "her arm hurt". The following information was reported: DIZZINESS (non-serious) with onset 12Feb2022, outcome "not recovered"; BACK PAIN (non-serious) with onset 12Feb2022, outcome "unknown", described as "tremendous back pain"; LOSS OF CONSCIOUSNESS (medically significant) with onset 12Feb2022 at 02:00, outcome "unknown", described as "Passed out"; HYPOTENSION (non-serious) with onset Feb2022, outcome "unknown", described as "Low blood pressure"; BRADYCARDIA (medically significant), outcome "unknown"; LOSS OF PERSONAL INDEPENDENCE IN DAILY ACTIVITIES (non-serious), outcome "unknown", described as "has not been able to drive"; FATIGUE (non-serious), outcome "unknown"; DIZZINESS (non-serious), outcome "unknown", described as "got light headed when blood pressure dropped"; HEADACHE (non-serious), outcome "unknown", described as "tremendous headache"; CHEST DISCOMFORT (non-serious), outcome "unknown", described as "Chest tightness"; GAIT DISTURBANCE (non-serious), outcome "unknown", described as "could barely walk"; THYROID DISORDER (non-serious), outcome "unknown", described as "her thyroid was slightly elevated"; INFLAMMATION (non-serious), outcome "unknown", described as "she was marked positive for  ANA, the result for inflammation"; MALAISE (non-serious), outcome "unknown", described as "she was not feeling well". The event "tremendous headache" required emergency room visit. The events "dizziness" and "got light headed when blood pressure dropped" required physician office visit and emergency room visit. The patient underwent the following laboratory tests and procedures: Antinuclear antibody: (unspecified date) Positive; Blood pressure measurement: (unspecified date) low; Blood test: (unspecified date) fine; (unspecified date) positive for ANA; Computerised tomogram: (unspecified date) Negative; Echocardiogram: (unspecified date) her heart was ok; (unspecified date) Negative; blood reports for lime: (unspecified date) Negative; Ophthalmological examination: (unspecified date) screen that has the black dots, notes: They were saying it was optical migraine vision; SARS-CoV-2 test: (Nov2021) Positive; Thyroid function test: (unspecified date) slightly elevated. Therapeutic measures were taken as a result of dizziness, hypotension, malaise. Clinical course: Reporter calling regarding the Pfizer COVID booster which she they received 11Feb2022. She states she is actually withheld mother and states she is calling on behalf of her because she is at work. She states her daughter received the booster 11Feb2022 and within 24 hours, she hasn't been the same. They are now on week 7 and caller states she just wanted to report that her daughter has gotten bradycardia, dizziness and has not been able to drive and has fatigue. Everything has been documented with the cardiologist and they say her heart is ok, thank god. They just did some panel and lime tests to rule out lime disease. It is now 7 weeks from the booster. Caller states her daughter hasn't been the same since. She has had COVID twice, she had it in 2020 and had it in Nov2021. She also had 2 Pfizer shots back in the spring of 2021. Caller states they all had to have it. Her daughter works in a hospital, so it wasn't completely the 3 months when it was mandated that she get the booster. According to the cardiologist, he believes her because she had the virus and has had the shot. It is like she is having an auto immune response and she is only 23. Clarified that the caller is calling on behalf of her daughter, withheld, who is the name she first provided. Caller provided her name as withheld and clarified that the same number she previously provided is the same number. Reporter states her daughter has 2 doctors and provides the details for the cardiologist, stating he is the one who is kind of taking care of everything. Reporter states her daughter got the shot 11Feb2022 and states she was taking Tylenol because she was not feeling well. She states her daughter had a reaction to the first 2 shots, too. Her daughter got the shot at 2:00pm, in the afternoon, 11Feb2022 and on 12Feb2022 at 2:00am, she passed out and they had to call an ambulance. She complained on the was to the restaurant that day, in the car, that she was in tremendous back pain. When they were at the restaurant, her daughter got dizzy and they were giving her sugary drinks and they had cold ice packs on her. When that went down, her daughter has not been right, since. Her daughter has not been able to drive, and she has low blood pressure. When her blood pressure dropped, she got light headed. They did an echo and they did all these tests which helped in telling her this was going to happen and to assure her that her heart was ok. This dizziness, hasn't left her and it has been 7 weeks. Caller states the primary doctor said that it was not a side effect of the vaccine and does not believe her. She states that is why they are going with what the cardiologist said. The cardiologist even said he has seen several young patients who have had side effects. Clarified that when the ambulance came, the patient did not go to the hospital. Caller states that when the ambulance came, she was ok. That was a Saturday and she believes that either Monday or Tuesday, and she does not have the exact dates, her daughter ended up going to emergency because she was complaining of a tremendous headache. The doctor told her to go and get a CAT scan, which was negative and the blood work was fine. Her daughter was released and was pretty much home for the week and, they were just watching over an monitoring her. At the time, she was also complaining of chest tightness and things she had when she had COVID. They did get better but then she could barely walk but, things did get better. Caller states her daughter was actually able to go back to work but, they have to drive her back and forth. She gets dizzy and has to sit down and can't fully function. They also had to check her vision and they went to see an eye doctor. It was like the screen that has the black dots when  you go to the eye doctor, that is what the caller states her daughter was seeing. They were saying it was optical migraine vision. Treatment: The only thing this family has done before is go for acupuncture. Caller states her daughter is a migraine sufferer and she has gone before for acupuncture and states it has helped with anxiety but, it is not helping with the dizziness. The cardiologist also said to keep her blood pressure up  and make sure she is eating every 2 hours and drinking. She has been drinking caffeinated beverages because the caffeine seems to help raise the blood pressure and seems to be helping. The cardiologist had said that if they were to give her any medication it would be caffeine related.  The only medicine she is on is Omeprazole, for acid reflux. Clarified that the patient had COVID prior to getting the COVID vaccines. Caller states her daughter was working in the hospital and came down with it. Her case was severe and she probably should have ended up in the hospital. She didn't get back on her feet until Aug2021, it took her that long to recover. The second time she got COVID was Nov2021 and they all had gotten it and it wasn't severe at all. Clarified that the second time the patient was positive with COVID was after she has the first 2 shots of the COVID vaccine. Caller states she thinks her daughter had the first shot the last week in Dec2020 and the second shot, Jan2021.  She had to go to the hospital for the first 2 shots and she was one of the first ones to get it. Caller states the rest of their family couldn't get it until Mar2021 or Apr2021. Test results: When they went to the specialist, they did a ton of blood reports for lime and everything was negative. The only thing that showed up in the blood work was that she was marked positive for  ANA, the result for inflammation, and it showed antinuclear antibodies, and was positive. They said it showed an auto immune response going on and showed her body is going through some-thing. her thyroid was slightly elevated and they said that was in response to this and she does not have any thyroid condition. They state it was just because of what she was going through. No prior vaccination within 4 weeks, She thinks it was a regular thing with vaccines, maybe a 24 hour thing. She was still able to go skiing. She had to take Tylenol and stay in bed for 24 hours. By the third day, she was fine. they said it showed an auto immune response going on and showed her body is going through some-thing. her thyroid was slightly elevated and they said that was in response to this and she does not have any thyroid condition.  Follow-up attempts completed. No further information is expected.