fever of over 103 degrees; resting heart rate elevated from a normal average around 63 beats per minute to an average of 67- elevated to as high as 135; headache; body aches; nausea; I started my period a few hours later - I had an endometrial ablation 10 months ago and haven't menstruated in more than 6 months.; I started my period a few hours later - I had an endometrial ablation 10 months ago and haven't menstruated in more than 6 months.; slight redness; swelling in my face; This is a spontaneous report from a contactable consumer. A 50-years-old non-pregnant female patient received bnt162b2 (PFIZER-BIONTECH COVID-19 VACCINE, Formulation: Solution for injection, Batch/Lot Number: EW0172), dose 2 via an unspecified route of administration, administered in Arm Left on 14Apr2021 at 10:30 (at the age of 50-years-old) as dose 2, single for covid-19 immunisation. The patient medical history was not reported. The patient had no known allergies. Other medical history was none. The patient had an endometrial ablation 10 months ago and have not menstruated in more than 6 months. The patient was normal weight and above average fitness with no known health issues. The patient's concomitant medications were not reported. Historical vaccine included bnt162b2 (PFIZER-BIONTECH COVID-19 VACCINE, Formulation: Solution for injection, Lot number: ER8730) as dose 1 via an unspecified route of ad-ministration, administered in Arm Left on 24Mar2021 at 12:00 (at the age of 50-years-old) for covid-19 immunisation. On 14Apr2021 at 23:00, the patient experienced fever of over 103 degrees, resting heart rate elevated from a normal average around 63 beats per minute to an average of 67- elevated to as high as 135, headache, body aches, nausea, i started my period a few hours later - i had an endometrial ablation 10 months ago and haven't menstruated in more than 6 months, slight redness, swelling in my face. The patient underwent lab tests and procedures which included body temperature: 103 degrees on 14Apr2021, heart rate: elevated to as high as 135 throughout the night, heart rate: heart rate elevated on 14Apr2021 heart rate elevated from a normal average around 63 beats per minute to an average of 67 - elevated. Facility type for vaccination was Public Health Clinic/Administration facility. The patient did not receive any other vaccines in 4 weeks. About 10 hours after second vaccine the patient developed a fever of over 103 degrees that lasted 9-10 hours. During this time her resting heart rate elevated from a normal average around 63 beats per minute to an average of 67 - elevated to as high as 135 throughout the night. Strangely, the patient started her period a few hours later. She also had slight redness and swelling in her face three days later. All of her other symptoms were gone now but the vaccine did some odd and unexpected things to her body. The patient did not received treatment for the events. Patient was not covid prior vaccination. Patient did not test for covid post vaccination. Outcome of the events were recovering.  Follow-up (19Jul2021): Follow-up attempts completed. No further information expected.  Follow-Up (26Jul2021): Follow-up attempts are completed. No further information is expected.