she thought she was dying.; chest pains; She thought it was a heart attack; under her arm was hurting badly, like a throbbing pain; feeling sick; worn out/tired; back were hurting bad; got the booster; blood clots/right leg doppler of her leg/ calf and found the blood clot; got the booster and got the flu shot; the pain woke her up and it was horrible; blood pressure was up; shortness of breath; Under her arm was swollen and bulged out/one leg was bigger than the other; inflammation from the shot; the pain woke her up; This is a spontaneous report received from contactable reporter(s) (Consumer or other non HCP) for a Pfizer sponsored program (159558). The reporter is the patient.  A 54 year-old female patient received bnt162b2 (BNT162B2), administered in arm left, administration date 05Nov2021 (Lot number: 320308D) at the age of 54 years as dose 3 (booster), single for covid-19 immunisation; influenza vaccine (INFLUENZA VACCINE), administration date 05Nov2021 (Batch/Lot number: unknown) as dose number unknown, single for immunisation. Relevant medical history included: "High blood pressure", start date: 2016 (ongoing); "Chronic kidney disease", start date: 2014 (ongoing). The patient's concomitant medications were not reported. Vaccination history included: Bnt162b2 (first dose; Lot number: EP7533), administration date: 01Apr2021, when the patient was 53 years old, for Covid-19 immunization, reaction(s): "broke out in hives", "itched"; Bnt162b2 (second dose; Lot number: EW0171), administration date: 22Apr2021, when the patient was 53 years old, for Covid-19 immunization, reaction(s): "Really ill", "Weak", "Tired", "Body aches", "Headaches", "Really bad chills", "She was in bed for 2 days", "Numbing in her leg and foot". The following information was reported: IMMUNISATION (medically significant) with onset 05Nov2021, outcome "unknown", described as "got the booster"; THROMBOSIS (medically significant) with onset 05Nov2021, outcome "unknown", described as "blood clots/right leg doppler of her leg/ calf and found the blood clot"; PAIN (medically significant) with onset Nov2021, outcome "unknown", described as "the pain woke her up and it was horrible"; NEAR DEATH EXPERIENCE (medically significant) with onset 07Nov2021 02:00, outcome "unknown", described as "she thought she was dying."; CHEST PAIN (medically significant) with onset 06Nov2021, outcome "unknown", described as "chest pains"; MYOCARDIAL INFARCTION (medically significant) with onset 06Nov2021, outcome "unknown", described as "She thought it was a heart attack"; PAIN IN EXTREMITY (non-serious) with onset 06Nov2021, outcome "unknown", described as "under her arm was hurting badly, like a throbbing pain"; MALAISE (non-serious) with onset 06Nov2021, outcome "unknown", described as "feeling sick"; FATIGUE (non-serious) with onset 06Nov2021, outcome "unknown", described as "worn out/tired"; BACK PAIN (non-serious) with onset 06Nov2021, outcome "unknown", described as "back were hurting bad"; BLOOD PRESSURE INCREASED (non-serious) with onset Nov2021, outcome "unknown", described as "blood pressure was up"; DYSPNOEA (non-serious) with onset Nov2021, outcome "unknown", described as "shortness of breath"; PERIPHERAL SWELLING (non-serious) with onset Nov2021, outcome "unknown", described as "Under her arm was swollen and bulged out/one leg was bigger than the other"; INFLAMMATION (non-serious) with onset Nov2021, outcome "unknown", described as "inflammation from the shot"; SLEEP DISORDER (non-serious) with onset Nov2021, outcome "unknown", described as "the pain woke her up"; PRODUCT USE ISSUE (non-serious) with onset 05Nov2021, outcome "unknown", described as "got the booster and got the flu shot". The events "blood clots/right leg doppler of her leg/ calf and found the blood clot", "the pain woke her up and it was horrible", "she thought she was dying.", "chest pains", "she thought it was a heart attack", "under her arm was hurting badly, like a throbbing pain", "feeling sick", "worn out/tired", "back were hurting bad", "blood pressure was up", "under her arm was swollen and bulged out/one leg was bigger than the other", "inflammation from the shot" and "the pain woke her up" were evaluated at the physician office visit and emergency room visit. The patient underwent the following laboratory tests and procedures: blood pressure measurement: (Nov2021) up; blood test: (Nov2021) positive for blood clot; chest x-ray: (05Nov2021) normal; (Nov2021) negative; magnetic resonance imaging: (05Nov2021) normal; (Nov2021) negative; troponin: (05Nov2021) positive for a blood clot; ultrasound doppler: (05Nov2021) blood clot; (Nov2021) blood clot. Therapeutic measures were taken as a result of pain, near death experience, myocardial infarction, sleep disorder and treatment included muscle relaxer. The pain stopped after patient took a muscle relaxer, but a few hours later she had pain again. The pain was horrible and she could not forget about it. She said that she got up around 0700. Patient laid in bed and thought it would go away, and around 1200-1230 she went to the hospital because she couldn't bare the pain. Patient clarified that she was not admitted to the hospital. Prior vaccinations (within 4 weeks) reported as none.