Fever wiped me out; Fatigue for a few weeks; Stroke like headpain; Rapid heart rate; Felt like having stroke then heart racing/stroke like headpain; Heart racing; Chills; Pain; Arm felt like it was beaten with a bat; This is a spontaneous report from a contactable consumer(patient), reported in response to Non-HCP letter sent in cross reference to 2 reports. This is second case of two reports. A 48-year-old female patient received second dose of BNT162B2 (PFIZER-BIONTECH COVID-19 mRNA VACCINE, Formulation: Solution for injectio), intramuscularly administered in right arm on 26Feb2021 09:00 am (at an age of 48-year-old during vaccination) as 2nd dose, single dose for covid-19 immunisation. The patient medical history included Hashimotos disease from 2000 and ongoing, high blood pressure from unknown date and ongoing, breast cancer from 2015 underwent lumpectomy on Dec2015, ovarian cyst from 2020 and ongoing, Afib (atrial fibrillation) from Apr2019 to an unknown date, atrial fibrillation event due to too much thyroid medication and heart had extra beat benign. The patient's family history included methylation issues, cardiac issues, cancer, higher BP, medication don't work like they should on many family members. Concomitant medication(s) included levothyroxine sodium (TIROSINT) taken for Hashimotos disease from an unspecified start date and ongoing, levothyroxine (LEVOTHYROXINE) oral taken for Hashimoto's disease from an unspecified start date and ongoing, alprazolam (XANAX) taken for anxiety from an unspecified start date and ongoing; mecobalamin (B12 METHYLCOBALAMIN) methylated B-12 taken for methylenetetrahydrofolate reductase deficiency (MTHFR deficiency) from an unspecified start date and ongoing; vitamin c [ascorbic acid] (VITAMIN C [ASCORBIC ACID]), zinc (ZINC); ergocalciferol (VIT D); calcium, magnesium (CALCIUM MAGNESIUM [CALCIUM;MAGNESIUM]); calcium levomefolate (METHYL FOLATE).  The patient previously received of BNT162B2 (PFIZER-BIONTECH COVID-19 mRNA VACCINE, Formulation: Solution for injection, Batch/Lot number: Not reported), intramuscularly administered in right arm on 28Jan2021 13:30 as 1st dose, single dose for covid-19 immunisation. The vaccination facility was reported as high school for 1st dose and public health clinic for 2nd dose. The patient had not taken any other vaccine 4 weeks prior to Covid-19 vaccination. On 31Jan2021, the patient underwent lab test and procedures which include blood work: unknown result, did not show heart attack or blood clot, apple watch as abnormal, heart rate was 144 at rest and x-ray as normal. The patient stated that she had ER trip after vaccination. Doctor though she had an embolism and wanted to do a CT. Because of her breast cancer she wanted to avoid heavy radiation and instead she did her x-ray and blood work. On 31Jan2021, the patient experienced two cardiac events. Heart racing was major, so she went to emergency response center. Her oxygen was 90, her heart rate was 144 at rest. Second time lasted a few minutes. On the same day (31Jan201), the patient stated that both events wake her from sleep and took her breath away and also felt that dermal filling around mouth felt numb right after 1st vaccine around 20 min after which lasted a while ago. On unknown date in Feb2021, the patient experienced stroke like headpain, felt like having stroke then heart racing, fever wiped her out, rapid heart rate, chills, pain, fatigue for a few weeks. She also experienced arm felt it was beaten with a bat. These events were presented for nighttime for 2 days. The seriousness of the events considered as disability and the event arm felt like it was beaten with a bat was assessed as non-serious. Therapeutic measures such as heated blanket was taken to chills and fever. The patient took treatment medication such Tylenol, Xanax to slow heart rate and electrolytes for the resulted events. The outcome of the events was recovered for all events in Feb2021 and unknown for the event arm felt like it was beaten with a bat.