I was just hospitalized for brain spasm; Numbness of my limbs, my arms; Lightheadedness/Dizziness; Heart palpitations; I have the heavy three menstrual cycle in a month; every single month for the last year and now I am not even having weekend between them I am on my 4th menstrual cycle for the month; patient just got off her period 5 days ago and nowhave it again; Two months after consistent bleeding; this is not normal; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non HCP). The reporter is the patient.  A 23-year-old female patient received BNT162b2 (BNT162B2), as dose 2, single (Lot number: FL3197), in arm for covid-19 immunisation. The patient's relevant medical history was not reported. There were no concomitant medications. Vaccination history included: Covid-19 vaccine (Dose number: 1, Manufacture: unknown), for COVID-19 immunization.  The following information was reported: CEREBRAL DISORDER (hospitalization), outcome "unknown", described as "I was just hospitalized for brain spasm"; HYPOAESTHESIA (non-serious), outcome "unknown", described as "Numbness of my limbs, my arms"; DIZZINESS (non-serious), outcome "unknown", described as "Lightheadedness/Dizziness"; PALPITATIONS (non-serious), outcome "unknown", described as "Heart palpitations"; HEAVY MENSTRUAL BLEEDING (non-serious), outcome "unknown", described as "I have the heavy three menstrual cycle in a month; every single month for the last year and now I am not even having weekend between them I am on my 4th menstrual cycle for the month"; POLYMENORRHOEA (non-serious), outcome "unknown", described as "patient just got off her period 5 days ago and nowhave it again"; MENSTRUAL DISORDER (non-serious), outcome "unknown", described as "Two months after consistent bleeding; this is not normal". The event "two months after consistent bleeding; this is not normal" required physician office visit. Therapeutic measures were taken as a result of menstrual disorder. Clinical course: The patient was still experiencing side effects but on top of the side effects which were numbness of limbs/arms, lightheadedness, dizziness and heart palpitations. On top of that, had the heavy three menstrual cycle in a month, every single month for the last year and now not even having weekend between them and on her 4th menstrual cycle for the month and this all this Feb. The patient just got off her period 5 days ago and now have it again and she don't take medicine and don't take get vaccines the only vaccine she have had within the last 10 years of Pfizer.  The patient went to an gynecologists like about two months after consistent bleeding and they are the ones that told me like that this was not normal.  The patient ended up getting on birth control (Name could not be clarified hence, captured as unspecified medication) thinking it will stop the bleeding and they gave me signs of 'closure' before they gave me birth control things and she  was bleeding three times a month before I even get birth control. On top of the bleeding there was another side effect, she was just hospitalized (Further hospitalization details were not available over the call hence, Seriousness criteria not checked) for heart spasm (Later clarified as brain spasm).