fainted 3 times when I have never fainted before; constant extremely painful headache; skipped period; late period the 3rd month; joint pain in knees, elbows, neck, and hands; head sweating; IBS - constant use of bathroom; not being able to sleep; feeling dizzy (vertigo)/ lightheaded; feeling dizzy (vertigo); low blood pressure; This is a spontaneous report received from contactable reporter (consumer or other non-HCP). The reporter is the patient.  A 34-year-old female patient (not pregnant) received the third dose of bnt162b2 (BNT162B2) via an unspecified route of administration, administered in the left arm on 10Jan2022 16:15 (batch/lot number: unknown) at the age of 34 years old, as DOSE 3 (BOOSTER), SINGLE for COVID-19 immunization. Relevant medical history included: "PCOS" (unspecified if ongoing). Patient had no known allergies. Patient had no history of COVID prior to vaccination. Concomitant medications; other medications in two weeks included: AMITRIPTYLINE and PROZAC. Patient has not received other vaccines in four weeks. Vaccination history included: Bnt162b2 (first dose, via an unspecified route of administration, administered in the left arm (batch/lot number: unknown) as DOSE 1, SINGLE), administration date: Feb2021, when the patient was 33 years old, for COVID-19 immunization; Bnt162b2 (second dose, via an unspecified route of administration, administered in the left arm (batch/lot number: unknown) as DOSE 2, SINGLE), administration date: Mar2021, when the patient was 33 years old, for COVID-19 immunization.   The following information was reported: SYNCOPE (disability, medically significant) with onset 10Jan2022, outcome "not recovered" described as "fainted 3 times when I have never fainted before"; HEADACHE (disability) with onset 10Jan2022, outcome "not recovered" described as "constant extremely painful headache"; MENSTRUATION IRREGULAR (disability) with onset 10Jan2022, outcome "not recovered" described as "skipped period"; MENSTRUATION DELAYED (disability) with onset 10Jan2022, outcome "not recovered" described as "late period the 3rd month"; ARTHRALGIA (disability) with onset 10Jan2022, outcome "not recovered" described as "joint pain in knees, elbows, neck, and hands"; HYPERHIDROSIS (disability) with onset 10Jan2022, outcome "not recovered" described as "head sweating"; IRRITABLE BOWEL SYNDROME (disability) with onset 10Jan2022, outcome "not recovered" and all described as "IBS - constant use of bathroom"; INSOMNIA (disability) with onset 10Jan2022, outcome "not recovered" described as "not being able to sleep"; DIZZINESS (disability) with onset 10Jan2022, outcome "not recovered" described as "feeling dizzy (vertigo)/ lightheaded"; VERTIGO (disability) with onset 10Jan2022, outcome "not recovered" described as "feeling dizzy (vertigo)"; HYPOTENSION (disability) with onset 10Jan2022, outcome "not recovered" described as "low blood pressure." The events were evaluated at the physician office visit. The patient underwent the following laboratory tests and procedures: magnetic resonance imaging: (unspecified date) unknown results; sleep study: (unspecified date) unknown results; blood pressure measurement: (10Jan2022) unknown, notes: low blood pressure sometimes. Therapeutic measures were taken as a result of the events which included MEDS, MRI, SLEEP STUDY. Patient has not been tested for COVID-19 post vaccination.  The batch/lot number for bnt162b2 was not provided and will be requested during follow up.