It is not uncommon for digestive symptoms to erupt as you advance your diet. Mostly, it is by adding more adventurous foods too rapidly or increasing your portions too much. Basically, if you eat more than you can readily digest, the bacteria work on it, causing gas and churning in the gut.
You can try scaling back on your diet (carbohydrates in particular). Another thing to try is digestive enzymes, as some people get good results with them. Probiotics may help balance your gut bacteria, but that varies from person to person.
If things get worse or the above does not help within a few weeks, call your doctor, as you may have developed pouchitis or bacterial overgrowth, and antibiotics are necessary.
Jan