Dizzy; Lost all the strength in her arms and legs; Passed out; Nauseous; She dropped to her left when she passed out and fell in shower; Ear completely clogged up only on the left side; Headache; Tired; Soreness on my arm; This is a spontaneous report from a contactable consumer (patient). A 44-year-old female patient received her second dose of BNT162B2 (PFIZER-BIONTECH COVID-19 VACCINE, lot number and expiration date were not provided), via an unspecified route of administration on 07Mar2021 at 11:00 at single dose for COVID-19 immunization. Medical history included underactive thyroid. Concomitant medication included unspecified thyroid medication. The patient was asking if her symptoms were normal following the vaccination. She got the second dose of the COVID vaccine yesterday, 07Mar2021 at around 11:00 (also reported as 10:00 to 10: 15 or 10:30). Throughout the day, she was fine and mentioned that she had soreness on her arm later. At around 22:00, she was driving home and started feeling a slight headache and reported that she didn't take anything. She was tired, so when she got home, the patient fell asleep. She woke up and did feel a slight headache and couldn't sleep on her left arm because it was killing her, but it was fine. At 5:30 this morning (08Mar2021), the headache was still there. She then stood and sat up, took her thyroid pill because she has an underactive thyroid and was on the highest dose of thyroid replacement. The patient stated that the events happened so fast, as soon as she got into the shower. She got out of bed and started walking, grabbed her stuff to shower and started feeling that her headache was building up more than it had all morning so far. She thought maybe it was just because she had just physically gotten up and started walking. She got into the shower, and for about 2-3 minutes into getting into the shower, she remembered she had started putting shampoo into her hands; grabbing the shampoo bottle; but she suddenly got so nauseous and the headache that came on was extreme. She did not have a lot of time to react. She thought she would throw up in the shower, she had no time to get out of the shower to the toilet to throw up; she suddenly felt dizzy, passed out in the shower and fell to her left side on the floor. All she could remember before she passed out was that she had the shampoo bottle in her hands and she said out loud, she heard herself say "What is happening to me". Then she lost all the strength in her arms and legs. She remembered for a split second she tried to hold on, she dropped the shampoo bottle on the floor and grabbed the rail or edge of the shower and tried to hold on because she felt herself when she went down. Her left ear was completely clogged up only on the left side. When she passed out, thankfully she thought by trying to hold on to the rail or edge of the shower that she kind of eased her fall down, so she did not fall hard or hit her head. She did not know if she passed out for seconds or minutes because she has no idea exactly when she went into the shower, maybe around 05:45; but when she woke up she realized she was on the floor, she was not flat on the floor but on her knees, having fallen to the left side with her head off to the side on the shower wall; the glass door to her shower was wide open and all the water was coming out of the shower; it scared her when she woke up. The outcome of the event passed out was recovered on 08Mar2021, not recovered for headache, and unknown for all other events.   Information on the lot/batch number has been requested.