Have you been to a gastroenterologist for these symptoms? Sometimes abdominal surgery can trigger other GI issues. You may have a problem with too much bile secreted since you no longer have a gall bladder to mete this out, and a simple med like Colestid could help. You may have developed either IBS or IBD, and diet and meds could help. None of us can diagnose this - you really need to see a GI specialist to determine the cause and what will help.