I have been having symptoms of severe right side abdominal pain, nausea, vomiting, and loose watery stools for over 3 years. After 4 GI docs, I found one that took a plain belly x-ray and determined that I was extremely backed-up. He then ordered a colonoscopy and determined that I have a redundant colon and chronic constipation with chronic diarrhea. I am not sure if this will help anyone, but it may be something to bring up to your doctor since 4 out of the 5 I went to missed it. Even with all the fancy tests they performed like small bowel follow-through, flexible sigmoidoscopiy, capsule study as well as numerous blood and stool tests. Apparently this is not that common, but can become deadly if not caught in time due to the possibility of the bowel perferating. I hope this can help someone.