Are you taking any medical treatments-- mesalamine, for example?
Have you seen the Specific Carbohydrate Diet? The diet is a complete 180 from the diet you seem to be describing. But a lot of us with inflammatory bowel disease (I have ulcerative colitis) have found a lot of relief with it. It takes commitment and can be hard to adjust to-- it involves eliminating certain carbohydrates that are difficult to digest, because the undigested carbohydrate feeds yeast in the gut. At least that's my understanding of it-- I know it's more complicated than that. I just know it works, and very well. I have been on it for two years, and off my immunosuppressant drug for 8 months against medical advice, and I'm doing well, and I recently reintroduced a few "forbidden carbohydrates" just to see how I tolerate them.
Are you using medical-grade probiotics? Have you seen VSL#3? The probiotic capsules that you can buy retail typically contain about a billion cultures. A capsule of VSL#3 contains 8 different organisms, and the highest concentration available-- 450 billion cultures per capsule.
Live-culture foods can help a lot, too. Honestly, I can't imagine managing IBD without home-cultured yogurt, for instance.
Look into the SCD. It may not be for you, and there are definitely people it doesn't work for, but I've had so much success with it that I'm a big believer in it. And live-caught Pacific salmon for fatty acids. The omega 3s in supplements don't absorb as well as the ones in real foods. It's the same with the probiotics-- live cultures in food will survive the stomach environment better, and make it to where they belong.