Within 45 minutes: Hives and itching on my right arm, swelling in right arm and shoulder, tightness in my chest- it took effort to breathe deeply, and had a bad headache. I took Benadryl and Tylenol as soon as my symptoms started.  Within 2 hours: The headache was still present. I started to get dizzy with position changes. The tightness in my chest had resolved. I started to get clusters of hives that seemed to appear and disappear randomly. The hives were most prominent on my arms and hips/outer thighs but also occurred on my chest and stomach. I also noticed I would randomly get itchy- even in areas that I did not have hives especially on the palms of my hands and soles of my feet. Stomach cramps and worsening pelvic cramps that were present because of my Endometriosis.  Days 2-5: I had dizziness/room spinning sensation with position changes. Constant Headaches- unrelieved with Tylenol. I continued to randomly break out in hives off/on throughout the day. I felt exhausted but could not sleep. Muscle aches. Runny nose. Ringing in my ears and intermittent muffled hearing.  My resting heart rate went from 62-70 beats per minute to 110-115 beats per minute. I also had random spikes in my heart rate without cause to 130-190 beats per minute.   I called my doctor's office the morning of 05/25/2021. By the time my symptoms started to cause me any concern on 05/24/2021, after my vaccine, the office was closed.  I didn?t want to go to Urgent Care or the Emergency Room because of the number of COVID Positive patients causing increased exposure and extended wait times- some reported 5-9 hours after being triaged waiting to be examined, order exams, etc. I was advised to go to Urgent Care or the Emergency Room if the hives reached my neck/throat, I felt like my throat was swelling, itching in my mouth, etc, or if my symptoms got worse or unbearable. I kept Benadryl (100 mg each time I took it) and Tylenol in my system, increased my fluid intake, monitored my vital signs, rested/avoided unnecessary exertion, and had to call into work on the 27th and 28th because I was still dizzy and had a constant/pounding headache. The 27th was the first day I was scheduled after I had the vaccine. I returned to work on the 29th because my symptoms had improved enough that I felt I could work. I continued to get random clusters of hives for about 3 weeks. I started having more trouble sleeping and staying asleep. I work nights so have used Melatonin to help when needed. I had to increase the amount and frequency the same week I got the vaccine. I continued to have worsening difficulty sleeping and tried many other over-the-counter sleep aids. In August I was prescribed Ambien and still take it regularly to this day (October 6th).  I have suffered with Endometriosis since puberty and for the last 10 years dealt with daily symptoms. Prior to the vaccine my symptoms/issues had been unchanged and consistent for approximately 4 years. I had constant, mild/moderate level, pain and cramping in my lower abdomen/pelvis, cervix, and lower back. I had some severe pains/cramping intermittently every day and it was constant for a few days before and during my menstrual cycle. My monthly cycle had been moderately heavy and typically lasted 4-5 days- again unchanged in the 4 years prior. 3 weeks after I was vaccinated, with my first post-vaccine menstrual cycle, I noticed significant worsening with all of my Endometriosis symptoms. My daily pain was consistently moderate/severe with intermittent episodes of severe/very severe pain and my menstrual cycle from then on was much heavier and lasted for 7-9 days. I opted for a Total Hysterectomy July 21st, 2021, because I could not deal with the increased pain any longer.