pain in her arm in the muscle where the needle was placed; pain in her arm in the muscle where the needle was placed; she almost fainted; had so much tightness in her throat; couldn't swallow; the other arm pain; 8-10 days late for her period; This is a spontaneous report from a contactable consumer (patient). A 50-year-old female patient received the first dose of BNT162B2 (PFIZER-BIONTECH COVID-19 VACCINE, lot number: ER8731 and expiration date not provided), via an unspecified route of administration, in arm left, on 18Apr2021 09:30 (at the age of 50-year-old), at single dose, for COVID-19 immunization. Medical history reported as no. Concomitant medications were not reported. No prior vaccinations within 4 weeks. Patient was scheduled for the second dose on 09May2021 but she had doubts because of her reaction to the first dose. The patient experienced 8-10 days late for her period in Apr2021; pain in her arm in the muscle where the needle was placed on 18Apr2021; almost fainted on 18Apr2021; had so much tightness in her throat on 18Apr2021;couldn't swallow on 18Apr2021; and the other arm pain on 18Apr2021. Patient stated this was not an allergic reaction and the vaccination provider was about to administer the epi-pen but then she did not. Patient would like to know if her side effects are normal and if she should receive the second dose. Patient got the first shot on 18Apr2021 and she was scared of needles so she just didn't look at them but this one... Patient stated as soon as she got the shot, she had pain in her arm in the muscle where the needle was placed. Patient stated it's not a big deal. Patient stated the pharmacy said it's ok to feel pain and told caller to go sit down and they would be with her in half an hour or so. Patient stated she didn't even make it through the door, she almost fainted and could not hear what she was saying, she had so much tightness in her throat and she couldn't swallow. Patient stated it lasted about 2 to 3 minutes (also reported "lasted for 3-4 minutes"). Patient stated they called an ambulance but it took them 15 minutes to get there and she felt better by then. Patient stated because they told her to wait and she couldn't even get through the door so she just laid on the floor and her throat got so tight, she was frightened. Patient stated it lasted about 5 minutes, actually. Patient confirmed her symptoms began and ended on 18Apr2021. As for "hurting in her muscle; arm pain", patient stated she had the arm pain for two days but then her whole arm started hurting in that arm, but that was a different pain. Patient stated she got the shot at 09:30 in the morning and by 16:00 afternoon she started feeling the pain. Patient stated the pain from the needle when she got the shot, that pain lasted 5 to 6 hours or maybe she would say less. Patient stated after 16:00, then the other arm pain started. Patient stated she was putting ice on and off it for arm soreness overnight and into the next day. Patient confirmed her arm pain ended 19Apr2021. Patient confirmed she had recovered completely from all symptoms. Patient stated she didn't have any pains or anything so she would think she has recovered. Patient stated she went to her physician and the doctor suggested that she should take the second shot.  Patient stated she also was 8-10 days late for her period. Patient stated something happened and she said she couldn't do it because she was going to get her period and then it didn't come and days passed by. Patient stated she was supposed to get it 21Apr2021 or 22Apr2021, supposed to get it between 21Apr2021 and 25Apr2021 and she got it yesterday, 04May2021. Patient stated as soon as it passed 26Apr2021, but she was also 51 and menopausal so it might be that, but she doubts it. No emergency room or physician office require for events.  Treatment received for event "the other arm pain" included putting ice on and off. The outcome of the event "8-10 days late for her period" was recovered on 04May2021; of "pain in her arm in the muscle where the needle was placed/ almost fainted/ had so much tightness in her throat/ couldn't swallow" was recovered on 18Apr2021, of "arm pain" was recovered on 19Apr2021.   No follow-up attempts are possible. No further information is expected.