having a stroke or heart attack; high BP/Blood Pressure shot up to 210/110; back, shoulder and chest pain in the middle; had back pain; right shoulder pain; pain behind her neck; Vertigo so bad she had to hang on or stay close to things so she didn't feel like she was flipping over; big flare up of the vertigo; nausea/wave of nausea, very nauseous; felt like energy pressure up in her from the waist up; feeling cold and clammy; Cold and Clammy; This is spontaneous report from contactable consumer (reporting for self). A 68-years-old female patient received BNT162B2 (PFIZER-BIONTECH COVID-19 VACCINE, formulation solution for injection, Batch/Lot Number: EW0186-H; Expiration Date: 31Aug2021), via an unspecified route of administration, administered in arm right on 14May2021 at 14:35 as 1st dose, single dose for COVID-19 immunization (at the age of 68-years-old). The patient's medical history included ongoing underactive thyroid started 5-6 years ago and family history included relatives have had cancer. Concomitant medication included levothyroxine (LEVOTHYROXINE, 125mcg once a day) taken for hypothyroidism from an unspecified start date (started 5-6 years ago) and was ongoing. It was reported by the patient that on 14May2021, she received first dose of vaccine and the day after her vaccine on 15May2021, when she woke up, early in the morning when she takes her thyroid medication and she usually takes it at 07:00am every day and she keeps on schedule, but her stomach felt like it was going to flip, like she was going to vomit and she started experiencing vertigo and nausea and mentioned that vertigo was so bad she had to hang on or stay close to things, so she did not feel like she was flipping over and mentioned that states it had lessened a little bit, but not much and stated that a week after that, she had a big flare up of the vertigo, and she had to sit down in her wooden rocking chair with big arms and further stated that on 20May2021 it was night-time at 22:30 pm she got a very big wave of nausea and vertigo and her Blood Pressure shot up to 210/110, she had chest pain in the middle, not on the heart but the middle of chest, she was very nauseous, had back pain, right shoulder pain and pain behind her neck and she thought she was having a stroke and mentioned that she felt like energy pressure up in her from the waist up and she got cold and clammy. The patient further stated that she had her son call the paramedic at 23:00 pm and they took her to the hospital on the night of 20May2021 i.e., into the morning of 21May2021 because they thought she was having a stroke or heart attack and she was hospitalized, and they did tests for a couple of days. She reported that she has not gotten the second vaccine and she was not going to get her second vaccine at this time because she was still having the vertigo. She mentioned that she never had problems with high blood pressure, and she thought this might be one of the side effects. She was asking if there is a window of time that she has to get the second dose of vaccine and stated that the back and neck pain started to subside in route to the hospital and she had two more flare ups of chest pain in the hospital but everything besides the nausea and vertigo recovered by the time she was discharged, and they were taking her blood pressure every 15 minutes. The patient stated that she was hospitalized for three Days from 21May2021 to 23May2021. Therapeutic measures were taken to treat event was Nitro and Baby Aspirin and Blood Pressure Pill, Stress Test and went in and checked her heart. Stress Test was IV and Cat Scan or MRI to check her heart, cholesterol was excellent 90 but states they put her on a cholesterol medication to help her heart. Caller mentioned that they said that if anything was to happen, that helps the heart in a stressful condition, and it was a good thing to have on board. On an unspecified date in May-2021, the patient underwent lab tests and procedures which included Coronary angiogram which result showed no signs of obstruction, Cholesterol was 90 (units not provided) and stress test which result showed some Ischemia and on 20May2021 blood pressure was 210/110 (units not provided). The patient was recovered from vertigo on an unspecified date and on 21May2021 patient was recovered from the events of heart attack, back pain, shoulder pain and neck pain and on 23May2021 from hypertension, chest pain, feeling cold, clammy and felt like energy pressure up in her from the waist up and on 02Jun2021 from nausea.          Follow-up attempts are possible, further information is expected.