I received my booster shot on 12/21/21.  I first starting noticing my symptoms in beginning of January.  It started off with very mild pain in my lower back.  Each day it would build and over several days, pain became severe.  Pain also in my abdomen/pelvic area. I consistently have period cycles of  about 25 days. My period cycle December month was 38 days.  Went to GYN aptmt 1/10/22.  Left ovarian cyst was palpated.  Had ultrasound done 1/11/22.  Confirmed large simple cyst by left ovary.  No ovarian torsion.  Pain seemed to correlate with period and improved with time, but then pain returned and would  have days of intense pain and days of mild pain.  My follow up ultrasound  2/22/22 showed simple cyst resolved completely and Yet still having pain.   I went GI dr.  Also have been experiencing nausea throughout this time period as well as some GI symptoms of diarrhea, bloating.  Nausea feels like morning sickness and I did get prescription for Zofran. I have nausea on most days.  Intermittent.  Only take zofran if nausea severe. I experienced this  same type of nausea as well after my first 2 Pfizer vaccines on 2/19/21 and 3/12/21.  (Can see my web-based application text check in?s.)  That nausea lasted for about 5-6 weeks and then resolved. With my first covid shot, I had back aches that day of injection  on side I received shot in, (Aches traveled in my right arm, down my right side of my back) which then resolved.  I had some minor flare up of my APS with those doses.  After booster, i also have had intermittent joint pain in my knee.  This is one ways I flare up with my Antiphospholipid syndrome (APS).  I had strange headache which would throb for 3-4 seconds in my right temple and then go away.  I would experience this between 2-6 times a day.  That was in January and resolved.   I had ct scan done on 3/12/22.  It?s WDL with exception of fibroids, enlarged uterus, scattered sub centimeter hepatic hypodensities,  and scattered colonic diverticulosis.  GI Dr. cleared me. The pain I experience can be anywhere from mild to severe.  One night, i woke up at 3am in severe pain.  I had call out from work and not attend a couple social events due to pain intensity on certain days.  My Lyme disease testing came back negative.  CBC and liver enzyme panel WDL.  I feel I am experiencing this due to combination of my booster shot and my autoimmune condition.  Pain usually in my lower back.  Last few days, more pronounced in my right  mid back (behind my chest area). I can make pain increase by pressing into that area with my fingers.  Pain migrated to back of my head the last couple days.  Back head sore and tender with some pain continuing in my back as well.  I?ve had on and off vasculitis sensation in my fingers in last couple weeks as well.  I tested negative for Covid before my vaccine and after.  I was not sick and did not have a cold.  The only event I had was getting booster shot.  Have couple more Dr. aptmts coming up.   Pain overall tends to migrate in different areas of my back and lower abdomen. intensify and retreat.  Some days are better than others.  Nausea is consistent and pretty much daily experience.  Intermittent throughout day.   YES this is an adverse event.  IT?s been 3 months of pain and feeling like my body is broken.  I am an active person, average weight and height and I take my health very seriously.  I believed in vaccines and work in healthcare. However, the third dose caused harm to my body and caused an inflammatory response that has affected my life these last 3 months. I will not get a 4th booster and I implore the government to investigate other potential inflammatory responses in patients who were otherwise status quo in their lives until covid vaccine.  Check ER admissions for thyroid issues, GI inflammatory conditions, heart conditions, GYN inflammatory issues,  and see if those patients received a covid vaccine dose about a month prior to their ER admissions.