diagnosed with a blood clot; had massive fatigue; indescribable fatigue; severe knee pain that was completely out of the blue; it's like she can't function; she can't explain; brain fog; abnormal menstrual cycles both in frequency and heaviness of it, intensity; This is a spontaneous report from a contactable consumer (Patient). A 47-years-old female patient received second dose of BNT162B2 (PFIZER-BIONTECH COVID-19 VACCINE, Solution for injection, Lot number: EW0150), via an unspecified route of administration in the arm (unsure which arm) on 17Jun2021 (Time the Vaccination Was Given was reported as around 11 to 11:30) (at the age of 47-years-old) as a single dose for COVID-19 immunization. Medical history and concomitant medications were not provided. Relevant medical history like diagnosed allergies, compromised immune status, respiratory illness, genetic/chromosomal abnormalities, endocrine abnormalities (including diabetes) and obesity was reported as none. The patient had received first dose of BNT162B2 (PFIZER-BIONTECH COVID-19 VACCINE, Solution for injection, Batch/Lot number: Not provided), via an unspecified route of administration in the arm (unsure which arm) on 27May2021 (at the age of 47-years-old) as a single dose for COVID-19 immunization. History of all previous immunization with the Pfizer vaccine considered as suspect (or patient age at first and subsequent immunizations if dates of birth or immunizations are not available) and reported as none. No additional vaccines administered on same date of the Pfizer Suspect. On an unknown date Jun2021, after second vaccination, the patient experienced abnormal menstrual cycles both in frequency and heaviness of it, intensity; brain fog; weird complete trail of thoughts that she can't explain really well, she can't function; she can't explain. On 17Jun2021, the patient experienced severe knee pain that was completely out of the blue, had massive fatigue; indescribable fatigue, and diagnosed with a blood clot. The patient was hospitalized for blood clot from 18Jun2021 to an unknown date. It was reported, patient had the Pfizer COVID second shot in Jun2021 and since then, has been on a roller coaster of adverse events. States this all happened after her second shot on Thursday, 17Jun2021. She started with severe knee pain that was completely out of the blue and then being diagnosed with a blood clot. Has had massive fatigue since then and was at the hospital, went to the emergency room the next day after the shot. They admitted her to emergency room and let her go and did not stay overnight and they put her on Xarelto for blood clots. Unable to provide the lot number or expiry for the white Xarelto bottle. States it's tiny to see and provides  of #. Has had indescribable fatigue since then until this day and she can't explain the level of it, it's like she can't function. It was an overnight change.  It's like she went from land to Mars overnight. That level of fatigue is something she can't really explain. Has had weird complete trail of thoughts that she can't explain really well. Had abnormal menstrual cycles both in frequency and heaviness of it, intensity. Literally it was like that day she went to Mars and what she feels like is that she is alone in space somewhere. Feels like she entered a tunnel and can't get out and is in a place where it gets more and more with no resolution. No further details provided. Patient was not sure where the right place is or if she reached the correct area. She has dollar 1000 worth of bills and things and her insurance company told her to call Pfizer to see if she can get support for her bills and ongoing, but she does not know if she has the right department. The adverse events severe knee pain, had massive fatigue, blood clot; did result emergency room visit. The patient underwent lab tests and procedures which included body height: almost 5' but provides it as 4'11" on an unknown date, investigation (diagnosed with): blood clot on 17Jun2021. Therapeutic measures were taken as a result of diagnosed with a blood clot and treatment included Xarelto. The outcome of the events was not recovered at the time of report.