Got my period on October 13th and it didn't stop until November 21st. I had about 13 days of heavy bleeding as well.; Mild pain in left arm for a few days; swelling and large red patch on left arm that lasted about a week (didn't hurt anymore than the few days from normal achiness after getting a shot , just looked bad); swelling and large red patch on left arm that lasted about a week (didn't hurt anymore than the few days from normal achiness after getting a shot , just looked bad); This is a spontaneous report received from contactable reporter(s) (Consumer or other non HCP). The reporter is the patient.  A 49 year-old female patient (not pregnant) received bnt162b2 (BNT162B2), administered in arm left, administration date 02Oct2021 13:45 (Lot number: FC3182) at the age of 49 years as dose 3 (booster), single for covid-19 immunisation. Relevant medical history included: "gastric bypass(10/2000)" (unspecified if ongoing). Concomitant medication(s) included: LEVOTHYROXINE; PROBIOTICS; CRANBERRY; MULTIVITAMIN [VITAMINS NOS]. Past drug history included: Codeine, reaction(s): "Allergy". Vaccination history included: Bnt162b2 (Dose 1, Batch/Lot No: EN6201, Location of injection: Arm Left, Vaccine Administration Time: 09:30 AM), administration date: 15Feb2021, for COVID-19 immunization; Bnt162b2 (Dose 2, Batch/Lot No: EN6202, Location of injection: Arm Left, Vaccine Administration Time: 09:30 AM), administration date: 08Mar2021, for COVID-19 immunization, reaction(s): "13 days of heavy bleeding", "Had my period from 29Apr until 21May, it stopped only for a few days and started again from 24May until 08Jun", "Bladder infection", "Blood in urine", "high bilirubin count". The following information was reported: HEAVY MENSTRUAL BLEEDING (non-serious) with onset 13Oct2021, outcome "unknown", described as "Got my period on October 13th and it didn't stop until November 21st. I had about 13 days of heavy bleeding as well."; PAIN IN EXTREMITY (non-serious) with onset 2021, outcome "unknown", described as "Mild pain in left arm for a few days"; SWELLING (non-serious), ERYTHEMA (non-serious) all with onset 2021, outcome "recovered" (2021) and all described as "swelling and large red patch on left arm that lasted about a week (didn't hurt anymore than the few days from normal achiness after getting a shot , just looked bad)". The events "got my period on october 13th and it didn't stop until november 21st. i had about 13 days of heavy bleeding as well.", "mild pain in left arm for a few days", "swelling and large red patch on left arm that lasted about a week (didn't hurt anymore than the few days from normal achiness after getting a shot , just looked bad)" and "swelling and large red patch on left arm that lasted about a week (didn't hurt anymore than the few days from normal achiness after getting a shot , just looked bad)" were evaluated at the emergency room visit. Relevant laboratory tests and procedures are available in the appropriate section. Therapeutic measures were taken as a result of heavy menstrual bleeding, pain in extremity, swelling, erythema.  Additional information: The patient did not receive other vaccine in four weeks. The patient did not have covid prior vaccination. The patient had tested for Covid post vaccination. The patient received Antibiotics as treatment for the events.  No follow-up attempts are possible. No further information is expected.