Age: 35.0
Sex: F
Vaccine: COVID19, COVID19
Symptoms: Pyrexia
Clinical narrative: Sore arm; Headache; Slight fever; When I got my period three weeks after the vaccine, it was by far the worst period I've had in years. I have had terrible cramps for four days (even though I stopped bleeding on the third day); I couldn't stand up straight for two days because the cramps were so bad and I had to stay in bed most of the time.; My period was heavier than normal with really big clots; My digestion has been really impacted during this time, too.  Usually during my period, my digestion is very fast and my bowels clean out, but I've been super constipated this time; Hot flashes.; This is a spontaneous report from a contactable consumer, the patient. A 35-year-old non-pregnant female patient received the first dose of BNT162b2 (PFIZER-BIONTECH COVID-19 mRNA VACCINE; Lot Number: EW0150) via an unspecified route of administration in the arm left on 06Apr2021 at 16:00 (at the age of 35-years-old) as a single dose for COVID-19 immunisation. Medical history included chronic low white blood cells (WBC) and had known allergy to food( food sensitivities). Prior to the vaccination, the patient was not diagnosed with COVID-19. The patient did not receive any other vaccines within four weeks prior to the vaccination. Concomitant medications included supplements (unspecified) for an unknown indication from an unknown date and unknown if ongoing. The patient previously received cefaclor (CECLOR) for an unknown indication on an unknown date and experienced drug allergy. On 25Apr2021 at 09:00, after the vaccine the patient experienced mild symptoms the day after the vaccine sore arm, headache, slight fever. Otherwise, the patient felt fine.  When the patient got her period three weeks after the vaccine, it was by far the worst period she has had in years. She has had terrible cramps for four days (even though she stopped bleeding on the third day). The patient couldn't stand up straight for two days because the cramps were so bad and she had to stay in bed most of the time. Her period was heavier than normal with really big clots. Her digestion has been really impacted during this time, too. Usually during her period, her digestion was very fast and my bowels clean out, but she has been super constipated this time. She was also having hot flashes. The cramps are terrible. None of the remedies she typically uses for menstrual cramps are doing anything.  She tracks her cycle and am very aware of my body and what my periods are like and this has been absolutely unlike anything before. She hasn't had a period this bad since she was a teenager. The events did not result in doctor or other healthcare professional office/clinic visit, emergency room/department or urgent care. Therapeutic measures were not taken as a result of the reported events. Since the vaccination, the patient had been tested for COVID-19. On an unknown date in Apr2021, the patient underwent SAR-COV2 test (nasal swab test) and the result was negative. The clinical outcome of the events sore arm, headache, slight fever, terrible  period cramps, the patient couldn't stand up straight for two days, period was heavier than normal with really big clots, constipation and hot flashes were not resolved at the time of this report.   No follow-up attempts are needed. No further information is expected.