What Causes Upper Abdominal Pain Along With Vomiting And Profuse Sweating?

I ve had this intermittent upper right quad pain which has been gone for a while and came back yesterday I used to wake at 2:30 AM and vomit but last night I had intense upper abdominal pain with profuse sweating and I felt like I was going to faint. I actually had the fainting feeling once before in the middle of the night when I had diarrhea,I checked my hr with my apple watch and read 39 and was told it was syncope from a valsalva which I didn t think I did and know I didn t last night. My gallbladder was removed before all this bc gallbladder attacks, which this feels like except it lasts longer. I ve had every test and they find nothing. I took dicyclomine for a couple of years and didn t help. Any idea why I have this? It feel really bad, I was afraid I was going to fall off the toilet!