soreness in my arm; feel not very well; Headache; really had an appetite. I am in pretty bad shape; feeling so bad; fatigued; unable to complete daily tasks and is barely able to get out of bed; Chills; body aches; Fever; This is a spontaneous report from a contactable consumer (patient) reported for herself. A 38-years-old female patient received BNT162B2 (PFIZER-BIONTECH COVID-19 VACCINE, Solution for injection. Batch/Lot Number: EW0162), dose 1 via an unspecified route of administration, administered in left arm on 13Apr2021 (Age at vaccination: 38-years-old) as DOSE 1, SINGLE for COVID-19 immunization. Medical history included migraine (She has a history of occasional migraines) from an unknown date and unknown if ongoing. Concomitant medication included escitalopram oxalate (LEXAPRO) taken for anxiety, depression, start and stop date were not reported. Patient reports arm pain that peaked overnight but resolved within 24hours. That Saturday during the late morning/early afternoon started to feel a little spacey and developed a really bad headache. Since Monday, 19Apr2021, patient has been very fatigued and unable to complete daily tasks and was barely able to get out of bed. Patient has chills, body aches, fever, and an ongoing headache, which has resulted in her missing 4 days of work. The symptoms had been ongoing for 7 days and Patient would classify them as severe. Patient had a concerned about the adverse events recurring, missing additional work, and getting fired. Patient experienced the soreness in arm which subsided the next day. On Saturday patient started to feel not very well with the headache patient initially thought it was a migraine so patient took some Excedrin (treatment) and lay down so next day it started to get worse (further clarification unknown). Patient went to emergency room today because patient have been feeling so bad but patient did not have any test or anything back yet. Patient still experiencing the problem, it started like said on Saturday afternoon and it suddenly gotten worse although patient have to say Monday was the worse of its been better since then but it had not really improved but I feel it was it sort of stagnated. Patient would like to report that, a very abnormally severe reaction to first dose of the COVID-19 vaccine. Patient was also very concerned about the getting the second shot because patient understanding was that the side effects were even more severe so patient was very worried because patient missed work for 4 days now, patient was pretty worried. Patient had been experienced, 6 days of pretty severe symptoms from the reaction to first shot. Patient had not really been able to complete basic daily task. Patient missed about 4 days of work patient was feeling pretty bad and it did not seem to be improving very quickly so patient was pretty concerned about current state considering how weak, Patient also had really had an appetite. Patient was in pretty bad shape. Reporter seriousness for all ad-verse events were reported as unspecified. Patient was seen at the ER but was only offered supportive care and a COVID-19 test. Patient confirmed the date of emergency room visit as 22Apr2021. Patient has been taking extra-Strength Tylenol to manage symptoms. Patient took Excedrin and Tylenol as to manage the chills the headache and the body aches and fever. The second dose scheduled on 04May2021. The outcome of the events were unknown.  No follow-up attempts are needed. No further information is expected.