blood clots when she wipes, they're shaped and formed/menstrual bleeding with the cramping and clots/shouldn't even have a menstrual cycle and its getting worse; heavy menstrual like bleeding; nausea; severe cramping/menstrual bleeding...with the cramping; back pain; headache; very uncomfortable; a lot of pain; This is a spontaneous report from a contactable consumer (patient). A 32-year-old female patient received BNT162B2 (PFIZER-BIONTECH COVID-19 mRNA VACCINE), via an unspecified route of administration, administered in arm left on 28May2021 (Batch/Lot Number: EW0191) (at the age of 32-year-old) as dose 1, single and via an unspecified route of administration on 18Jun2021 (Batch/Lot Number: EW0191) (at the age of 32-year-old) as dose 2, single for COVID-19 immunisation. Medical history included hoshimottos diagnosed at age 12 or 13 and hypertension. Concomitant medication included calcium levomefolate, drospirenone, ethinylestradiol betadex clathrate (BEYAZ) taken for birth control. The patient had been on birth control for a few years now and with her doctors okay she skipped her placebo week. The patient got the first vaccine 28May2021 and the second one on 18Jun2021. The patient had noticed that where she wasn't having break through bleeding and issues before, she was having a lot break through bleeding and blood clots when she wiped, they're shaped and formed in Jul2021. The patient stated she should not be bleeding at all and when she noticed the issues she switched her birth control with a different hormone combo that may have been more effective. The patient was having heavy menstrual like bleeding, severe cramping, and nausea so bad that she was considering going to the emergency room in Jul2021. The patient's doctor said it could take a few months to adjust to the new birth control but she had noticed these problems with the other birth control. The patient shouldn't even have a menstrual cycle and its getting worse. The patient didn't have problems before the shot and this was the only thing she can assume. The patient wasn't the only one reporting menstrual bleeding after the vaccine. She stated the menstrual bleeding was nonstop for a couple of months. It had amped up in the last couple of months with the cramping and clots in Jul2021. It felt like the patient wasn't taking birth control. The patient was originally on BEYAZ when she got the vaccine and experienced breakthrough bleeding. The patient was then switched to Apri and experienced worsened bleeding. The patient was then swapped to Seasonique and had been on it a month now. The patient had had cramping, blood clots, heavier bleeding, back pain, nausea and a headache. The patient's doctor wanted her to stay on this and didn't think the blood clots were alarming. The patient stated she was very uncomfortable and in a lot of pain daily in 2021. The outcome of the events "blood clots when she wipes, they're shaped and formed/menstrual bleeding with the cramping and clots/shouldn't even have a menstrual cycle and its getting worse", "heavy menstrual like bleeding" and "severe cramping/menstrual bleeding...with the cramping" was not recovered, of the other events was unknown.