This is a spontaneous report from a contactable consumer or other non hcp (patient). A 49-year-old female patient received bnt162b2 (PFIZER-BIONTECH COVID-19 VACCINE, Formulation: Solution for injection), dose 1 via an unspecified route of administration, administered in Arm Left on 22Apr2021 (Batch/Lot Number: ER8736) as dose 1, 0.3 ml single for covid-19 immunisation. Medical history included menopause from an unknown date. The patient's concomitant medications were not reported. The patient did not receive any other vaccines within four weeks prior to the vaccination. On an unknown date in Apr2021, the patient experienced i got pelvic pain all of a sudden on my right side of my pelvis/right sided pain, i had vaginal discharge and my vagina was swollen/vaginal swelling/swelling in the vaginal. Patient experienced i thought i had an ovarian cyst/had a simple ovarian cyst on the right on 04May2021, out of the blue the hormones went crazy, body is producing estrogen now, gained a pound and a half, endometrial lining was thickened on an unspecified date. Patient got the first dose on the 22Apr. About 5 days later patient got pelvic pain all of a sudden on her right side of my pelvis. Patient had vaginal discharge and her vagina was swollen. Patient thought I had an ovarian cyst. Patient have been in menopause 2 years. Patient haven't had a period in 2 years. Patient went to the doctor and he said the thickening of her lining was thicker than normal. He said patient was producing estrogen. Out of the blue the hormones went crazy. Patient was wondering if it was the first Pfizer shot. Her vagina basically atrophied a while back. Patient am afraid to get the second dose. What if it causes something serious like a big cyst or a torsion. Caller states it just happened a few days after the Pfizer first dose she doesn't even want to get the second dose she's scared. Caller states it actually made her gain a pound and a half it did something to her it's bizarre. Caller states she doesn't know what to do. Caller states she was googling online about situations with menstrual stuff and people have said they were experiencing menstrual stuff too she thought she was going crazy. Caller states she used to get ovarian cysts years ago and all of a sudden she's like what the heck because she basically was in menopause for two years and she didn't get discharge anymore and she basically had where her vaginal area was atrophied then all of a sudden she got pain on her right side four to five days later discharge and swelling in the vaginal area and it was bizarre. Caller states she thought oh my gosh she thinks she has a cyst. Caller states she hadn't gained any weight she wasn't eating anything different, she different change her lifestyle at all. Caller confirms her pelvic pain discharge and swelling in vaginal area began 26Apr2021 or 27Apr2021 4-5 days after vaccine. Caller states she went to the doctor on Monday 03May2021. Caller states the next day 04May2021 she had to go back to get a pelvic ultrasound and he told her that her endometrial lining was thickened and she had a simple ovarian cyst on the right side but she was correct. The patient underwent lab tests and procedures which included smear cervix: unknown on 03May2021, ultrasound scan vagina: thickness on 04May2021 (Endometrial lining thickened, right ovarian cyst), weight: gain a pound and a half, blood oestrogen: abnormal, hormone level abnormal: abnormal on an unknown date. The outcome for event I got pelvic pain all of a sudden on my right side of my pelvis/right sided pain was not recovered while rest of events was unknown.  No follow-up attempts are needed. No further information is expected.