Warning: Gross stuff ahead. If you don't want to hear about constipation, trapped gas, pain and suffering

, this is not your thread.
So I've been having some tummy issues since the end of March. I have been having a pinching, twisting feeling in my lower left. I then had a horrible bout of diarrhea that hurt on the left while it was going on. I thought I had an ovarian cyst pushing on something so the gynecologist had me do a trans-vaginal ultrasound and it was fine. Nothing on the left side. Gyno said it was probably diverticulitis, sent me to my gastro.
Gastro ordered abdominal CT with contrast and bloodwork. It showed diverticulosis and a lot of poop, but no other issues. He told me to get Magnesium Citrate (aggghhh) and take it. i did and it cleared me out. That was this past weekend, mostly Sunday.
Monday I started feeling like I had a big balloon under my ribs. It was a 10 on the discomfort scale, not pain exactly but MISERABLE. I was in a meeting and had to drape my arm over the back of the chair to take pressure off my guts, stretching my abdomen out as much as possible. UGH. I took ultra-strength Phazyme and charco-caps all day with zero relief. I ended up in the ER.
The ER did another abdominal CT (four days after the last one) and said I had thickening in my gallbladder wall and fluid around it. They did an abdominal ultrasound and it said I had sludge. They said, go see this surgeon for a consult on Tuesday and then have it out on Thursday.
Soooo, that was all really fast for me with a normal CT on Thursday and you need surgery on Monday. I also don't know if this will solve my problem since I don't have stones. Esp. since this started on the lower left and I still don't know what caused that (diverticulosis alone won't unless it's inflamed or infected, and mine wasn't).
Can you please share your symptoms with me and your experience with the surgery? I do not want unnecessary surgery. And, this may sound petty, I have a non-refundable vacation to the beach in 3 weeks and I want to be able to get in the Gulf.
Since Monday I have only been able to eat very small amounts and am avoiding anything I think might make it angry but although I haven't had the level of that sensation back since Monday, my upper abdomen feels a little hard and it feels like a smaller balloon is in there, and a band around my rib cage. The discomfprt has been in the center or on the left, not the right. No shoulder blade issues either. I do have a hiatal hernia.
Thanks for reading this far.