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; nauseated at night; has to make herself vomit to feel a little relief; experiencing loose stools; faint feeling; low blood pressure; lose her train of thought and focus on things; 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 24Aug2021 (Lot number: FD8448) at the age of 29 years as dose 2, single for covid-19 immunisation. Relevant medical history included: "PTSD" (ongoing), notes: verbatim: PTSD. Concomitant medication(s) included: ZOLOFT taken for post-traumatic stress disorder (ongoing). Vaccination history included: Bnt162b2 (dose 1,single, Anatomical location: Left arm, Batch/lot number:FA7485), administration date: 03Aug2021, when the patient was 29 years old, for Covid-19 Immunization, reaction(s): "menstrual cycle 5 days late, spotting, no cycle:". The following information was reported: MENSTRUAL DISORDER (non-serious) with onset 2021, outcome "not recovered", described as "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"; NAUSEA (non-serious) with onset 2021, outcome "not recovered", described as "nauseated at night"; VOMITING (non-serious) with onset 2021, outcome "unknown", described as "has to make herself vomit to feel a little relief"; DIARRHOEA (non-serious) with onset 2021, outcome "not recovered", described as "experiencing loose stools"; DIZZINESS (non-serious) with onset 2021, outcome "not recovered", described as "faint feeling"; HYPOTENSION (non-serious) with onset 2021, outcome "not recovered", described as "low blood pressure"; DISTURBANCE IN ATTENTION (non-serious) with onset 2021, outcome "unknown", described as "lose her train of thought and focus on things". Relevant laboratory tests and procedures are available in the appropriate section.  Additional Information: Is report related to a study or programme was reported as no. Other Products was reported as yes. Additional Information for Other Conditions: diagnosed a couple of years ago. States she did receive a flu shot a week prior to the second dose of the vaccine, has never had side effects with the flu shots. 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 has had nausea-which has gotten worse, loose stools, has been feeling faint, reports that it is hard to focus and she has been losing her train of thought, and has had low blood pressure. She stated this is all getting worse. 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. 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. States she has been feeling bad the past 2.5 weeks, states she nauseated at night, states sometimes she has to make herself vomit to feel a little relief. States she is experiencing loose stools, faint feeling, states it is getting worse, states she went to urgent care, has low blood pressure, states it causes her to lose her train of thought and focus on things. Caller states she did just gave 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 12 Aug and 5 days later noticed the spotting. Tested for pregnancy and its not, thyroid was tested, unknown results, states she was tested for Covid and that was negative. States her urine was fine at the urgent care, states they saw a little bacteria but that it was nothing to be concerned about. Caller wants to know if anyone else has reported similar experiences after the vaccine. No follow-up attempts are possible. No further information is expected.