she felt terrible; I wanted to do was sleep; had the worst, most crashing headache; her ears were ringing; low grade fever; she was so tired; she was very achy; Booster; had her Covid third booster shot and she got sick for one day; her arm was sore after; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non HCP) for a Pfizer sponsored program. The reporter is the patient.  A 69 year-old female patient received bnt162b2 (BNT162B2), administered in arm left, administration date 29Oct2021 13:00 (Lot number: FF2590) at the age of 69 years as dose 3 (booster), single for covid-19 immunisation. Relevant medical history included: "Hypothyroidism" (unspecified if ongoing), notes: Hypothyroidism, DIAGNOSED AT LEAST 10 YEARS AGO; "Rheumatoid arthritis", start date: 2016 (ongoing), notes: Rheumatoid arthritis, DIAGNOSED IN 2016, IN REMISSION, NOT TAKING MEDICATION; "Hashimoto's thyroiditis" (ongoing), notes: < 10 years ago; "Acid reflux", start date: Jul2020 (ongoing). Concomitant medication(s) included: SYNTHROID taken for autoimmune thyroiditis (ongoing); OMEPRAZOLE taken for gastrooesophageal reflux disease, start date: Jul2020 (ongoing); LEVOTHYROXINE taken for autoimmune thyroiditis (ongoing). Vaccination history included: Bnt162b2 (Dose 1, Date:05Mar2021 Time:11:30 AM, in Left shoulder via intramuscularly, Lot no.EN6203), administration date: 05Mar2021, when the patient was 69 years old, for Covid-19 Immunization; Bnt162b2 (DOSE 2, Date:26Mar2021 Time:11:30 AM, in Left shoulder via intramuscularly, Lot no.ER8733), administration date: 26Mar2021, when the patient was 69 years old, for Covid-19 Immunization. The following information was reported: IMMUNISATION (non-serious) with onset 29Oct2021 13:00, outcome "unknown", described as "Booster"; ILLNESS (non-serious) with onset 29Oct2021, outcome "recovered", described as "had her Covid third booster shot and she got sick for one day"; PAIN IN EXTREMITY (non-serious) with onset 29Oct2021, outcome "recovered", described as "her arm was sore after"; HEADACHE (non-serious) with onset 30Oct2021, outcome "recovered", described as "had the worst, most crashing headache"; TINNITUS (non-serious) with onset 30Oct2021, outcome "unknown", described as "her ears were ringing"; PYREXIA (non-serious) with onset 30Oct2021, outcome "recovered", described as "low grade fever"; FATIGUE (non-serious) with onset 29Oct2021 22:00, outcome "not recovered", described as "she was so tired"; MALAISE (non-serious), outcome "recovered", described as "she felt terrible"; PAIN (non-serious) with onset 29Oct2021 22:00, outcome "recovered", described as "she was very achy"; HYPERSOMNIA (non-serious), outcome "recovered", described as "I wanted to do was sleep". Relevant laboratory tests and procedures are available in the appropriate section. Additional information: After the patient had third vaccine which was at 1 pm and became very tired and achy about 10 pm that day. The next morning she woke up with a very terrible headache, her ears were ringing and she had a fever between 99 degree to 100 degree. she was very achy and all she wanted to do was sleep. It lasted until 10 pm that night. the next morning and felt much better just very tired. No prior vaccination (within 4 weeks). There was none special relevant test specific to thromboembolic event to thrombocytopenia  No follow-up attempts are possible. No further information is expected.