left ear felt like loss of hearing a few times then it cleared up; rapid heartbeat/increased to 108 beats per minute; ringing in the ear; facial warmth and flushing; facial warmth and flushing; scratchy tingling weird feeling in throat; itching of the skin (has sensitive skin); Lightheaded; This is a spontaneous report from a non-contactable consumer (patient). This 45-year-old female patient received 1st dose of BNT162B2 (COMIRNATY, Batch/lot number: 301308A, Expiry Date: 30Nov2021, 30mcg/0.3mL injection), at the age of 45 years old, on 15Oct2021 at around 16:00-16:30, in left arm deltoid, at single dose 0.3 ml for covid-19 immunization. Medical history was blood clots and low blood pressure. Concomitant drugs were not reported. Caller asking if her second Covid 19 Vaccine can be Johnson & Johnson. If you can mix the vaccine after taking the first one as Pfizer? Caller voiced she was trying to stay away from Johnson & Johnson because of the history of blood clots. After receiving her first Pfizer Covid 19 Vaccine she experienced rapid heartbeat increased to 108 beats per minute (after about one hour and lasted about 7 hours), facial warmth & Face flushed/flushing, lightheaded, Throat felt kind of weird, felt sensations in her throat/a little scratchy, tingly, weird feeling in her throat, itching of the skin (has sensitive skin), left ear felt like loss of hearing a few times then it cleared up, about 1-1.5 hours later she had ringing in the ear. She got flushed first, so felt warm and flushed right away, probably like within about 15 minutes of administration of the Pfizer Covid 19 Vaccine: Around 16:15-16:45. Then she felt a little bit, maybe just a little bit lightheaded, not too bad though, wasn't bad or anything. When she got home her throat felt kind of weird, felt sensations in her throat, a little scratchy, tingly, weird feeling in her throat; not terrible or anything just felt a little weird and she felt a little itchy. Then it was a little bit later when the rapid heart beat started-that probably happened like an hour after getting vaccinated; it didn't start right away or at least she didn't notice that right away, until she was sitting down and felt her chest pounding really hard and she was like what the heck. She checked her pulse and realized it was really high, increased to over 100 beats per minute; probably about 110 beats per minute. That lasted for about 7 hours, or at least she fell asleep after 7 hours so she does not know if it lasted longer that day. The next day her heart beat was still high, around 80 beats per minute; and the next day about 70 beats per minute; now it is about 60 beats per minute. She normally has a lower heart rate because she has low blood pressure and normally her heart rate is about 60 beats per minute. Regarding treatment or interventions for these events she just rested, tried to limit activity to not stress her heart rate any more; she didn't move around too much, took it easy. She verified that she has not required any visit to the physician's office, emergency room or hospitalization relative to any of these adverse events. She probably should have gone to the doctors or emergency room but was scared. She didn't want to go the emergency room and get COVID. Initially she thought she could go to urgent care, and thought she would just give it 20 minutes and she would probably be ok, then it was getting later in the day and she just thought urgent care was probably going to be closing soon so she left it as wait and see. By the time her rapid increased heart beat started the urgent care was closed and she didn't want to go to the emergency room and thought she would be ok. The caller would like to know if it is still totally fine for her to get the second dose of Pfizer Covid-19 Vaccine. Outcome of the event for left ear felt like loss of hearing a few times then it cleared up, ringing in the ear and rapid heartbeat was recovered, for other events was unknown.  No follow-up attempts are possible. No further information is expected.