Red blood cells are a little low; Hemoglobin and hematocrit were slightly low; Hemoglobin and hematocrit were slightly low; fluttering in chest; Rash on left side of face and neck; skin started burning; Anxiety and fear; Anxiety and fear; Racing heart beat; Dizziness/Lightheadedness; Headache; Nausea; Has been on her period for three weeks/Is premenopausal/Was bleeding at time of vaccination; This is a spontaneous report from a contactable Nurse reporting for herself. A 43-year-old female patient received the first dose of BNT162B2 (PFIZER-BIONTECH COVID-19 VACCINE, lot number: EL0142), via an unspecified route of administration at right arm on 06Jan2021 15:22 at single dose for covid-19 immunization. The COVID-19 vaccine was administered at Hospital, No agency site. Medical history reported included breast implants, She was healthy and had no medical diagnoses. The patient's concomitant medications was reported as none, She took no medications. The patient did not receive any other vaccines within 4 weeks prior to the COVID vaccine. The patient wanted to report a possible reaction to the COVID Vaccine. Has been to the ER three times. Had a racing heart beat, dizziness, lightheadedness, and nausea on 08Jan2021. Developed a rash and skin started burning on 11Jan2021. The rash was on the left side of her face and neck. Racing heart beat started first. Then dizziness, headache, lightheadedness, and nausea began. She also had anxiety and fear. All symptoms began on 08Jan2021. Went to the ER on 08Jan2021. Was discharged from the Emergency room. Last night, 11Jan2021, she felt fluttering in chest, but it wasn't as severe as two nights ago. Her EKG was normal. Patient Hoped nothing occurs today. Took three Benadryl last night. Racing heart beat, rash, dizziness, headache, lightheadedness, nausea were all ongoing. The patient was wearing a Halter monitor until 12Jan2021 at 15:00, total duration for Halter monitor is 24 hours. Seriousness: Definitely disabling. Sunday night she thought she might not wake up Monday. She was fearful of all of the weird. Investigations: The patient was advised her labs were ok. Red blood cells are a little low. Hemoglobin and hematocrit were slightly low. Thought hemoglobin was 10.7. EKG was normal, Chest X-Ray was negative. The patient was just trying to figure out why reaction occurred. She Had been on her period for three weeks, was pre-menopausal. Was bleeding at time of vaccination on 06Jan2021. She did have breast implants, and didn't know if that was related or not.  The patient Would not be getting the second injection. The nurse assessed the events of Racing heart beat, Anxiety and fear and Rash on left side of face and neck as related. The outcome of the event fluttering in chest was recovering, the outcome of the events Racing heart beat, rash, dizziness/ lightheadedness, headache, and nausea was not recovered and the outcome of the other events was unknown.; Sender's Comments: Based on temporal association, the causal relationship between BNT162B2 and the events cardiac flutter, palpitations, headache, dizziness and nausea cannot be excluded. The information available in this report is limited and does not allow a medically meaningful assessment. This case will be reassessed once additional information becomes available. The impact of this report on the benefit/risk profile of the Pfizer product is evaluated as part of Pfizer procedures for safety evaluation, including the review and analysis of aggregate data for adverse events. Any safety concern identified as part of this review, as well as any appropriate action in response, will be promptly notified to Regulatory Authorities, Ethics Committees, and Investigators, as appropriate.