blood clot; anemia; knee down felt tingly/like her legs were falling asleep; knee down felt tingly/like her legs were falling asleep; could not sleep; She was feeling uncomfortable constantly/she did not feel well; Shortness of breath; Her arm started hurting/was just at the injection site; This is a spontaneous report from a contactable consumer. This consumer (patient) reported for herself that a 36-year-old female patient received first dose of BNT162B2 (PFIZER-BIONTECH COVID-19 VACCINE, lot number: EP7533) at the age of 36-years, via an unspecified route of administration in left arm on 04Apr2021 12:15 at single dose for COVID-19 immunisation. Medical history included had a pregnancy (a while ago, not ongoing). No other products. The patient stated that she experienced shortness of breath on 08Apr2021 (4 days after receiving the first dose), it got so severe on day 7 that she went to the ER on 11Apr2021. She started getting progressively more shortness of breath. Twice, she called the nurse line for her doctor and was advised to go to the emergency room. Added she could not catch her breath, and it was worse at night, could not sleep, so she went to the emergency room, she was in emergency room for 2 and a half hours and then went home. She wanted to know if the second dose could cause issues or if she should get it, added that the paperwork said that people should not get the vaccine if they received an adverse reaction to the first dose or any vaccination. She did not know if this was normal for it to get progressively worse and 2 to 14 days later. Patient wanted to know if the shortness of breath was something that can get worse, if this was a reaction to the vaccine even though it happened so many days later. Patient added it was the only thing she could think of and that her heart rate, oxygen levels, and everything was good minus she felt like she could not catch her breath. The doctor in the ER gave her anti-anxiety medicine, something with an L, but the doctor gave her that and it really seemed to help. It was kind of like, she did not know, it made her feel calm enough to fall asleep. Caller added that she has that and an salbutamol (ALBUTEROL) inhaler. She was not sure whether progressively worsening shortness of breath had gotten any better or was still going on, added that yesterday was the day she did not need either treatment medication. The day before, she took just the anxiety medicine and not the albuterol. Yesterday, she took none. During the day on 11Apr2021 (Sunday), she had called because she was feeling uncomfortable constantly. She has two children and all day she did not feel well. She told her husband she did not feel well at all. Sunday when she went to lay down, she could not sleep. Patient reported that as her shortness of breath subsided, her arm started hurting again, thought this began on 19Apr2021 and was not sure, it went away completely and was just at the injection site, probably lasting half a day or so and then it went away, clarified as left arm, same as injection. Caller added that 15Apr2021 was after the ER visit, was that she was standing up doing things and from her knee down felt tingly. Stated that knee down felt tingly on 15Apr2021, which was after her ER visit occurred, she was standing up and doing things. She had not been doing things for long periods but her knee down felt tingly. Added not like numb, but like her legs were falling asleep. She was preparing dinner and moving around and felt tingling in both legs. This probably lasted about three hours. She just kind of took it easy and it started to subside and then it was gone. While mentioned investigations, patient stated the ER did an EKG, where they put stickers and monitor her heart. They did a chest x-ray, and they took blood. She believed they checked for blood clot tests and anemia. Patient did not know any results but stated the doctor came into the room and told her everything was clear and nothing came back with anything on it. She stated the date was either the night of 11Apr2021 or the morning of 12Apr2021 for the tests. Outcome of the events shortness of breath and arm hurting was recovered/resolved in Apr2021; of the event knee down felt tingly/like her legs were falling asleep was recovered/resolved on 15Apr2021; while of remain was unknown.   No follow-up attempts are needed. No further information is expected.