dose 1 on 08Sep2021 and dose 2 on 22sep2021; chest tightness; heart palpitations; dull aches on the left side of my chest and sometimes in my left arm; I had aches and fatigue; I had aches and fatigue; aches on the left side of my chest and sometimes in my left arm; This is a spontaneous report from a contactable consumer or other non-health care professional reported for herself (patient).   A 31-years-old female patient received bnt162b2 (PFIZER-BIONTECH COVID-19 mRNA vaccine, Solution for injection), dose 2 via an unspecified route of administration, administered in arm right on 22Sep2021 (Batch/Lot Number: FD0809) (at the age of 31-years-old) as dose 2, single for covid-19 immunisation. The patient medical history was reported as none. The patient had no known allergies. The patient concomitant medication(s) included vitamins nos (DAILY VITAMINS) taken for an unspecified indication, start and stop date were not reported and probiotics (PROBIOTICS) taken for an unspecified indication, start and stop date were not reported. The patient did not receive any other vaccines within 4 weeks prior to the Covid 19 vaccine. The patient had not been diagnosed with COVID-19 prior to vaccination and had been tested for Covid-19 since the vaccination. The patient received daily vitamins, probiotics, birth control medications within 2 weeks of vaccination. The patient had previously received the first dose of bnt162b2 (PFIZER-BIONTECH COVID-19 mRNA vaccine, Solution for injection), dose 1 via an unspecified route of administration, administered in arm right on 08Sep2021 (Batch/Lot Number: FD0809) as dose 1, single for covid-19 immunization and experienced soreness in her right arm. The patient received inappropriate schedule of vaccine administration. On 24Sep2021, the patient experienced aches and fatigue; aches in other parts of her body went away but aches in her chest did not. She started to have chest tightness, heart palpitations, and dull aches on the left side of her chest and sometimes in her left arm. She went to the urgent care and her EKG looked normal. They prescribed a low dosage of pain meds and muscle relaxers but it didn't help. She finally went to see a cardiologist yesterday, 04Oct2021 because she was considered she developed a heart issue but her heart looked fine and strong, but they have no idea why she still have adverse aches in her chest area. The heart doctor kept her on some strong Ibuprofen and steroids and she will see him again in a week. The doctor does feel like this was temporary and it's just prolonged autoimmune reactions from the shot. The patient hope he was right. The patient was visited to doctor or other healthcare professional office/clinic and emergency room/department or urgent care. The patient received treatment of anti-inflammatory drugs and steroids for the events. The patient underwent lab tests and procedures which included electrocardiogram resulted in normal on an unspecified date, nasal swab test (sars-cov-2 test) resulted in negative on 01Oct2021. The outcome of the event pain was recovered on 24Sep2021 and for the remaining events was recovering.  Follow-Up (12Oct2021): Follow-up attempts are completed. No further information is expected.