@mariec260 I was 18 and went to see a gastro. He did a colonoscopy and said he saw nothing wrong so I must have IBS-D and lactose-intolerance. I gave up cheese and milk and cheap lettuce and I was well for a long time. IBS can change over time. In my 40s I started to experience constipation. Then as meds were added for different needs I experienced more constipation so I typically take a magnesium everyday to help with that. I still don't eat cheap/fake cheeses, iceberg lettuce, very little fried food, not too much spicy food because I'm more prone to heartburn now. I call it IBS-C now just because of how my body changed in perimenopause. We start to slow down.

Being on antibiotics as often as you have been can certainly cause a yeast problem. My just-retired gynecologist would also take a swab then go look at it under a microscope and tell me yay or nay. The younger gynecologists and NPs need to culture. I've looked like I had yeast when the culture came back negative. You could also check into trying Nystatin tablets and doing the Candida Diet to see if you improve.

You situation reminds me a bit of my stepmom. She has been to the ER many times for pain and diarrhea. I think she has colitis or diverticulitis. Now she manages by avoiding wheat, nuts and seeds. The only legume she can eat is English peas. I think she can sometimes have green beans. And even herbs on a chicken breast can set her gut off. She's run the gamut with antibiotics. All I remember now is she hated Flagyl. I don't know if she suffered bouts of yeast infections but I wouldn't be surprised if she had more than a few.