5 days later she had some spotting but did not have a period; menstrual cycles were not there; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non-HCP) from medical information team. The reporter is the patient.  A 29-year-old female patient received bnt162b2 (BNT162B2), administered in arm left, administration date 03Aug2021 (Lot number: FA7485) at the age of 29 years as dose 1, single for COVID-19 immunisation. Relevant medical history included: "PTSD" (ongoing), notes: Verbatim: PTSD, diagnosed a couple of years ago. Concomitant medication(s) included: ZOLOFT taken for post-traumatic stress disorder (ongoing). The following information was reported: INTERMENSTRUAL BLEEDING (non-serious) with onset Aug2021, outcome "not recovered", described as "5 days later she had some spotting but did not have a period"; MENSTRUAL DISORDER (non-serious) with onset Aug2021, outcome "not recovered", described as "menstrual cycles were not there". The events "5 days later she had some spotting but did not have a period" and "menstrual cycles were not there" were evaluated at the physician office visit. Relevant laboratory tests and procedures are available in the appropriate section.  Additional information: Call warm transferred from    . The caller is a 29-year-old, she received the first dose on 03Aug2021 and was due for her menstrual cycle on 12Aug and 5 days later she had some spotting but did not have a period. She had her second dose of the vaccine on 24Aug2021 and 2 weeks later this happened again. She has had no period since she got the Pfizer Covid vaccines. She has communicated with 3 different medical people about her menstrual cycle, and they had not heard of that. She took a pregnancy test, and it was negative. She wanted to know if these are normal symptoms that have been reported and how long it may last? The caller asked how long she should wait before calling us back to report anything or to pinpoint whether anything is linked with the vaccine. Response: Explained that Pfizer cannot assess causality and referred her to her HCP. Explained that she can call us back at any time if she would like to provide any additional information. Is report related to a study or programme was reported as no. The covid vaccine was Pfizer product. Additional Information for Other Conditions: diagnosed a couple of years ago. Investigation Assessment was reported as no. Caller states that before reporting here, she has been to a couple of doctors, and they were clueless about what is going on. Caller states after receiving the first vaccine, a couple of weeks later she noticed her menstrual cycles were not there, they were non existent, states she had a major sweet tooth and thought her cycle was coming, was 5 days late, states she then noticed the clear discharge had streaks of blood, like spotting, states it was a minimal amount for 3 days, caller states her doctor told her not to consider it a cycle. Caller states she did just give birth on 01Jun2021 but has two other kids and her cycles were regular afterwards, thinks it is kind of weird, states she is not breast feeding through the night or every three hours. Due on 12Aug and 5 days later noticed the spotting. Caller wants to know if anyone else has reported similar experiences after the vaccine.  Follow-up attempts are completed. No further information is expected.