Sunday afternoon, March 22, I started having severe stomach pain, but I thought it was gas. The pain progressively got worse (located in my upper right abdominal quadrant, under ribs, radiating to right side of back and under right arm). By Wednesday, March 24, I went to urgent care. They thought it was a gallbladder issue and sent me immediately to the emergency room. I went to the emergency room at the same location I received a vaccine, . After a full work up, they ruled out I didn't have gallstones, kidney stones, a PE, or anything of the sort. They sent me home. The pain continued to get worse, I was vomiting from the pain. I have had smoothies and saltine crackers, and some soup, for the last month at this point. I'm not able to eat regular food without severe stomach distress. My bowel movements a few days after March 24, were constipated then diarrhea. Then constipated again, and diarrhea. I've been very hydrated - now that my gastroenterologist RX'd Zofran. Before that, i couldn't drink water without feeling nauseous.   I woke up Sunday, March 28, to the pain in my side, which happens often, but this time when I woke up, my heart was pounding out of my chest. I grabbed my finger monitor nearby, and my heart rate was at 211pbm (o2 was 94-99), for several minutes. It eventually went down into the low 100s. once i was able - i immediately had my roommate help me into a car to go to the hospital again and get checked out. At the hospital, EKG showed sinus tachycardia, and they noted my abdominal pain had gotten worse, but at that point, nothing else could be done. I'm now seeing Gastrointestinal specialists, and a cardiologist, but testing has yet to be resulted. I still have abdominal pain. I have also had a severe headache, the entire near Month since the first shot. Hydration & Tylenol help 50% of the time, other times it just doesn't go away.  It should be noted, that I did get my second vaccine shot, even though my stomach still hurt. The pain in my stomach has gotten manageable over the last three weeks, but part of this is just me getting used to it. I have also been prescribed a medication to help with the nausea & another medication to help with stomach cramping/gallstones by my gastroenterologist. these do not change my pain level at all.  Within three hours of getting the second vaccine shot, the stabbing pain came back in my stomach again. It was not a thought in my head that it was vaccine related until this second shot - or if it is vaccine related- but the fact that it came back with such strength right after the second shot leads me to make this report. My pain is now, six days after the second shot, following the same trajectory as after the first shot. my BM are normal. I would have gone to the emergency room for this pain by now, but seeing that it's following the same symptoms & timeline as last time, I haven't.  I have let my primary doctor know, which is the doctor listed on this form. I have not seen him since getting the vaccine. But we have been in email communication. I've also let my gastroenterologist know this information. For now, I don't have any any course of action, except waiting for testing to be resulted from the gastroenterologist. I am also on an extended holter monitor. The intense stabbing feeling coming back almost immediately, the same afternoon that I got the second shot, is what leads me to make this report. It seems as though the second shot restarted my symptoms back to worse again, but, they have NOT fully gone away in the 3 weeks after the first shot.  I did have a fever and fatigue the first 48 hrs after 2nd shot; fatigue & no fever after 1st shot. I have tested negative to 4 PCR &2 rapid Covid tests given in this time period.