arrhythmia; chest pain; felt like she had the flu; Body aches; fever; fatigue; arm began hurting; short of breath; This is a spontaneous report from a contactable consumer (patient). A 48-years-old female patient received bnt162b2 (BNT162B2), via an unspecified route of administration, administered in arm left on 20Apr2021 16:45 (Batch/Lot Number: ER8732) as 2nd dose, single for covid-19 immunisation. The first dose was received on 29Mar2021(lot number: ER8730) on the left arm, and experienced sore arm and tired. Medical history included ongoing outbreaks on lips. Concomitant medication(s) included valacyclovir. Patient went to the emergency room on 21Apr2021 with chest pain that started on 20Apr2021. She was put through tests and the medical staff didn't know what was wrong and was discharged on 22Apr2021 and went back to the emergency room with chest pain on Friday, 23Apr2021.  The medical staff could not figure out what was causing her chest pain during the second emergency room trip. Patient reported that the arrhythmia occurred when she got the chest pain on 20Apr2021. If she does any sort of activity, her heart rate skyrockets and her heart beats really super fast. She will become totally short of breath and feel like her lungs were burning.  She experiences the arrhythmia and shortness off breath not even with exercise, but just activity within the house. On 21Apr2021, patient had a fever, body aches, and felt like she had the flu for 3 days following the second dose of the Covid-19 vaccine. She went back to the emergency room again at a different hospital on Thursday, 29Apr2021 until 30Apr2021. She was going to see a cardiologist this on 07May2021 because she can't do anything. Her chest pain didn't start off this way, but now the patient can't be active without having chest pain, arrhythmia, feeling like something is sitting on her chest, and shortness of breath.The chest pain was initially brought on by exercise, but as of time of report, if she moves around or does too much, the chest pain will be brought on. Symptoms have changed a bit as time has gone by. If she sits still not doing anything, she will be fine. If she takes a shower, walks around her house, walks upstairs, she will experience the chest pain, shortness of breath, and feeling like something is sitting on her chest. If she does absolutely nothing like an invalid, she's ok. Event chest pain resulted in physician's office visit. Patient had EKGs (21Apr2021, 22Apr2021, 23Apr2021, 29Apr2021 and 30Apr2021), a stress test (22Apr2021), CT of the chest (21Apr2021), CT of the heart and arteries on (30Apr2021), X-rays, and echocardiograms (22Apr2021 and 29Apr2021) which were all of the diagnostic tests have come back normal. There was no way that she could do a stress test now. Her fatigue began the day after she received the second dose of the Covid-19 vaccine on 21Apr2021. Fatigue was the most intense the first couple of days when she felt like she couldn't get out of bed but she still gets tired very easily. It was worse in the sense that now she has no fever and yet still can't function normally. Her arm began hurting on 20Apr2021 and was sore for about a week. Patient had covid-19 screening on Apr2021: negative. Outcome of the events of arrhythmia, chest pain, shortness of breath and fatigue was not recovered, while for the remaining events was recovered.