feel a little dizzy/lightheaded; After the covid shot a couple days later there was blood. I'm 49 years old and missed a number of periods and a great number of months; bad headache/Slight Headache; pain at the shot site; tired; This is a spontaneous report from a contactable consumer (patient). A 49-year-old female patient received bnt162b2 (PFIZER-BIONTECH COVID-19 VACCINE, Solution for injection, Batch/Lot Number: EW0217), dose 1 via an unspecified route of administration, administered in Left arm on 24Jul2021 (at the age of 49-year-old) as single for covid-19 immunisation. Medical history included ongoing Epilepsy and Head surgeries and Low white blood count from an unknown date and unknown if ongoing. Concomitant Vaccines included tetanus vaccine taken on 04Aug2021 for an unspecified indication and diphtheria vaccine taken on an unspecified date for immunisation. Concomitant product name: Seizure Medications for use in the case of Epilepsy. Patient was supposed to receive her second dose on 14Aug2021. The patient also mentioned that she had epilepsy from a horse accident in 1992 and has needed head surgeries as a result of that accident. On an unspecified date in 2021 the patient experienced pain at the shot site and she was tired. On 24Jul2021 she had bad headache/slight headache, and it got worse even after she finished dinner. On 28Jul2021 she stated that after the covid shot a couple days later there was blood (bleeding after she had been six months without a cycle), missed a number of periods and a great number of months, her last time bleeding was 6 months ago and it was only for barely 2 days and on 29Jul2021 she felt a little dizzy/lightheaded. She was not sure if it was because of the tetanus shot or because she was tired from being up so long. It was reported as on 29Jul2021, she had very little blood and around 5:30 p.m. she started getting a slight headache and it got worse even after she finished dinner. Patient stated the blood was not very strong, she laid on the couch, and she felt a little dizzy 2 hours later. Patient mentioned on 30Jul2021, the period blood came out extremely light and she thought that it was over because she could not even tell if it was a period or not. Patient mentioned on 01Aug2021, there was no blood. Patient stated she gave her the shot and she was feeling okay and that night she had a little headache but it started getting worse and she took Advil. She only took 1 Advil, because she did not want to take too many because of her seizure medication. She stated the headache started wearing off as the week went on. Caller stated then on the 29th when she saw the blood she thought what is going on with her body, and the stress brought her headache back. She remembered taking another Advil. She called the doctor and she already had an appointment to go yesterday 04Aug2021 to find out about what is going on with starting her period again. Caller stated when she got there more was done to her than just asking questions. They did a PAP and gave her a Tetanus Diphtheria, TD, shot. Late in the evening she started to feel like lightheaded, not extreme, just very minutely lightheaded and slightly dizzy and the only thing she really could blame it on was the Tetanus shot and possibly that she had to wake up earlier than she usually ever wakes up to get ready for the doctor appointment and to get to do all the stuff done earlier than she usually does it, since her appointment was at 11:00 a.m. She was not a morning person and had to stay awake until midnight to get her seizure med in her. Caller stated the moment she got her seizure meds, boom, she was going to sleep and she went to sleep and she needed it. She stated today she was not feeling dizzy or anything at all. Caller stated her arm was sensitive from the Tetanus Shot. Outcome of the event bad headache/Slight Headache was resolved on an unspecified date in Jul2021 and missed a number of periods and a great number of months was resolved on 01Aug2021, feel a little dizzy/lightheaded was resolved on an unspecified date in 2021 and outcome of the events tired and pain at the shot site was unknown.