feeling out of breath hours later that lasted for 3 days; She was shaking and shivering in a heating blanket; irregular heartbeat after 20 minutes; blood pressure dropped; ringing of ears; body temperature dropped 2 degrees; heart palpitations; She was shaking and shivering in a heating blanket; she felt like she had been hit by a car.; This is a spontaneous initial and follow up report from a contactable consumer (patient). A 62-years-old female patient received first dose of bnt162b2 (PFIZER-BIONTECH COVID-19 VACCINE, Formulation: Solution for injection, Batch/Lot Number: ER8735; Expiration Date: Jul2021) via an unspecified route of administration in Arm Right on 10Jun2021 15:30 as single (at the age of 62-year-old) dose for covid-19 immunization. Medical history included hypothyroidism-Diagnosed in the 90's, maybe 30 years ago she was taking medication for that. Hypothyroidism she can responds a little worse than someone else to an illness because of her metabolism being lower. Patient states that why she was alarmed at first. She can feel a little more sick or drained than other people. She had allergies when she was younger and had to get allergy shots. Those allergies do not bother her anymore, like dust and pollen. She was overweight. She states she does have bad reactions to a few drugs, but she doesn't take those, things like a couple of antibiotics and a few other different things but nothing life threatening. Family history includes that her mother had lymphoma, but she was 80 something went through chemo but was fine now. The patient did not receive any other vaccines within 4 weeks prior to the COVID vaccine. The patient didn't have adverse event prior to vaccination. On 10Jun2021 15:50 she experienced irregular heartbeat felt like a skip or a thump and started about 20 minutes after injection. She waited there at the clinic for 15 minutes and then left. She says by the time she got home it was happening every 10-15 minutes. She states it wasn't life threatening because she was still alive. She had felt a skipped heartbeat from time to time in her life prior to the vaccine. She now has an irregular heartbeat a few times per day and heart palpitation. After vaccine between 16:00-18:00 blood dropped about 20 points and only lasted few hours. Her body temperature dropped 2 degrees. She states she started feeling worse a couple of hours after getting the vaccine. Caller states that she went home and felt so terrible and out of breath, she could hardly breathe. BP and temperature were back to normal the next day. Caller states that she got the shot around 3:30pm and all of this was occurring at supper time and she went to bed around midnight. Ringing in ears lasted 3 days, it was really loud. Sometime on 14Jun2021, she was feeling better. She thinks it has recovered and if it was going on it was minor, and she did not notice it. Around 18:00 midnight patient had chills and feeling out of breath she didn't do much that night. She noticed the shortness of breath a lot more on the next day. She says she was walking around huffing and panting for breath just to walk to the bathroom or to the kitchen. She wouldn't have been able to work. She was shaking and shivering in a heating blanket and she felt like she had been hit by a car. Patient states that she got the shot around 3:30pm and all of this was occurring at supper time and she went to bed around midnight. If this was a bad reaction and she thought it was bad because her heart was involved. She has talked with her doctor but says no one knows what to do. She does not want to go into shock or have her heart be even worse. The health officer who was monitoring situations, told her to get a blood test for antibodies to see if she was protected and she could wait a few months for the second vaccine. She would have to contact her doctor to get an order for that so she can see if the first vaccine worked and if she has antibodies then she has some protection. She doesn't know if she had an allergic reaction or if this was normal. She did not want to get the second vaccine and die. The patient did not visit Emergency Room/ Physician Office due to the events. The outcome of the events irregular heartbeat and heart palpitation recovering, BP dropped, and body temperature recovered on 11Jun2021, and the events shaking and shivering in a heating blanket, out of breath recovered on 13Jun2021. The outcome of the events ringing in ears and she felt like she had been hit by a car was unknown.  Information on Lot/Batch number was available. Additional information has been requested.