fever; fatigued; Did not have much energy/having no energy/low energy; Left Arm was painful and it got swollen a bit; Left arm painful; Foggy and not clear; extreme shortness of breath/cannot catch her breath; almost hyperventilating/Hyperventilation; This is a spontaneous report from two contactable consumers (including husband and patient self) and patient self. A 68-year-old female patient received 1st dose of BNT162B2 (PFIZER-BIONTECH COVID-19 VACCINE, lot number EN6204) at single dose on 20Mar2021 14:54 injected in left arm in the muscle for Covid-19 immunization. Medical history included shortness of breath, hypothyroidism and COVID-19 back in Dec2020. She had some food allergies that were diagnosed prior to getting the vaccine. Patient was tested positive for COVID on 21Dec2020 and negative on 20Jan2021. The symptoms followed for patient was a little coughing and no smell for 3 days and a little shortness of breath.  Family medical history was none. Concomitant drug included levothyroxine 0.75 ug, once daily for hypothyroidism, which was taking for 15 years (as of 19Apr2021). No previous history of all previous immunization with the Pfizer vaccine considered as suspect. No Prior Vaccinations (within 4 weeks). No additional vaccines administered on same date of the Pfizer suspect.  Patient experienced left arm painful on 20Mar2021 about an hour or two after she got the injection, did not have much energy on 21Mar2021 08:00, foggy and not clear from 21Mar2021 to 22Mar2021 08:00, shortness of breath started 24Mar2021 or 25Mar2021, and hyperventilation on an unknown date in Mar2021 (reported as a week or 9 days after receiving vaccine). The shortness of breath was what she referred to as hyperventilating.  That came a week after the vaccine. The same date they took shot was when the arm pain started and the low energy was the day after. Foggy and not being clear was from 21Mar2021 to 22Mar2021. Shortness of breath started 24Mar2021 or 25Mar2021.  In additional to shortness of breath, she had been hyperventilating.  That began approximately a week or 9 days after receiving vaccine. Left arm was painful and it got swollen a bit and lasted for 48 hours. The husband experienced arm pain and said he almost had a fever and felt fatigued.  The reporter thinks patient (his wife) felt the same.  She had arm pain and not much energy. They came out of that ok.  About a week after the first injection, she just cannot catch her breath.  She started hyperventilating to the point where the husband thought she would expire.  She also experienced being foggy and not clear and having no energy.  First, she went to a Cardiologist and he said there was nothing wrong.   She then saw a lung doctor who send for respiratory chest and did chest CT scans and everything was clear on both test.  He did not prescribe any medications. A week after she saw him, she went to the ER on 31Mar2021for hyperventilation and shortness of breath.  They prescribed Xanax (AER 2021434900).  She said it did not work and they prescribed something else. It was 25 mg twice a day which was in a pharmacy vial.  They then prescribed Lorazepam. She was afraid to take it.  She took one instead of two. The dose was 0.25 mg twice daily.  The ER did CT scan of chest with Contrast.  It was negative for thromboembolism (also reported as CAT scan's negative for blood clots). She had shortness of breath before the vaccination and it got worse. She was managing it though.  Outcome of left arm painful, foggy and not clear, did not have much energy/having no energy/low energy was resolving. Outcome of shortness of breath and hyperventilation was not resolved. Outcome of the other events was unknown.   Information about lot/batch number has been requested.