So sorry to hear this.
Just curious what was your symptoms and issues before surgery with your stomach/colon?
Before my ER visit in Nov. I was going to the bathroom all day. It was my 4th attack last year. And was the worse. Inflammation and infection were very high and the CT showed an abscess. I was lucky that it was small enough to not have surgery and just take the antibiotics. Amoxicillin Clay. (14 days)and Mesalamine.

I have been taking the Mesalamine 2xAM and 2 PM and have been a low fiber diet. I have normal BM in the Am only. I have had to take some MiraLAX a couple of days. In the last 2 mths. But, I have been going from CVS to CVS to refill the Mesalamine because it it on back order. I called Sun Pharma the mfg and was told they were to on backorder. Which is another reason I want to go off of it. (it has been the only medicine that has helped) My family Dr. recommended the surgeon and my GI Dr. said I would need the surgery too. That it will only get worse. That is why I decided to get before I have another episode. I am in good health otherwise and do not take any medications beside the Mesalamine. My blood work is back to normal. I am also back to working out 4 times a week with no pain.
I am seeing other people with your after-surgery issues and seeing others that said it was the best thing they did.
This is the hardest decision for me to make.
Have you tried the medical grade probiotics? I take a couple a day. I also stay consistent with food.
I have eliminated so much food too! I can eat steamed carrots that have to be mushy, French green beans and boiled or mash potatoes. That is all the vegetables I can eat right now. I can eat Jasmine rice grilled or baked chicken and some sandwich meat/cheese and saltines.
I too drink a lot of water but, have been adding apple and grape juice with mineral water every day. (no sugar added) I also drink a lot of Camomile, peppermint, green and other herbal teas. There is one that I got on amazon. See attached pic. I also buy ginger pces that help and eat very small meals!