I have lived with a "floppy" GI tract. I was born with a malrotation grade 2....I have had many "spells" of pain, high white count...etc. All of my colon is on the left, my appendix is on the lower left, my stomach is twisted 90 degrees clockwise.
So I can have right upper gastric pain, at times.

I will not have surgery...and several GI docs said better not anyway... The most critical thing I avoid is gassy foods. I use Maalox advanced (has simethicone in it) daily.
Cabbage, cauliflower, some spices, and most recently fructose and also coffee can set me off. Any stomach virus is a major event and takes longer to recover from.

Some dietary control, and smaller meals, and some Librax on bad days, and I am finally fairly normal at 60+. It was really hard on me when I was in my 20's. I ended up with an obstruction when 27. I managed to evade the scalpel even then.
I'd get another opinion before going under the knife.