Thought I was healthy at 39

So back on Nov 15, 2021 I started getting an intermittent dull pain on my lower right side. After a week of it I went to an urgent care and a X-ray was taken of my abdomen and a urinalysis was done and the Dr. Said both look fine and I must of pulled a muscle. Well fast forward to Nov 25, 2021 I started feeling weak and woozy, not well. Nov 26, 2021 I woke up at 2am it felt like my stomach was going to explode it hurt all over BAD I got up and went to the bathroom, while sitting on the toilet I fainted and hit my head on the bathtub hard. My wife woke up from the sound of the impact. I went to the ER and had a CT scan done of my abdomen which for the most part checked out. They did find short segment left mid abdomen small bowel intussusception of about 12mm. They also did a ultrasound of my gallbladder and other organs in that area including my aorta valve it also came back fine. A small bowel follow-through performed which came back fine. I had blood work done and it came back fine.The Dr said from my CT scan it looked like I was really backed up and needed to take some laxatives. Which I agreed I haven’t been going like normal which I thought was weird because I spend my whole life being VERY regular at least twice a day. So they sent me home I took laxatives and the following day Nov 27, 2021 I felt pretty good like I was out of the woods. Well that night I woke up and it felt like a hole was being burned into my stomach BAD. I was feeling woozy again and dizzy just not right, So I went I went back to the ER more blood work was done and it was fine. They also did a stool sample for Giardiasis and other bugs and that was negative. The Dr said he thinks I have a stomach ulcer. I said ok but I’ve never even had heartburn before or Indigestion, he said you can still get an ulcer. They gave me Sucrafate, Prilosec and dicyclomine. I took them and the pain went away pretty rapidly. Come the following day I felt pretty good and thought I was in the clear well I kept getting nauseous I had no energy I couldn’t eat I really felt like I was dying inside. I went back to the ER and they did more blood work and it came back normal Dr gave me anti nausea medicine would kind of helped. I lived like this with just constantly feeling sick and unwell for a couple more days then I went to another Hospitals ER where more blood work was done and it came back fine and they basically said it’s just a ulcer. Come Dec 10 I noticed my systems have slightly improved. I wake up feeling hyperglycemia and shaky I don’t have the nausea as bad and I’m able to eat easier. But every morning I wake up with what reminds me of a really bad hangover and come 3pm I start to feel better. I went to a GI Specialist who did some other blood test and she said my liver enzymes were slightly elevated 41 I believe the number was. I go in for a Endoscopy on Dec 22. To this day I still don’t have the energy I use to, I still feel weak and fatigue I still don’t poo like I use to and I’m really scared because prior to Nov 15 only issues I’ve ever had is a Appendicitis other than that I’ve been a health person on no medication. Any help or thoughts would be welcome.