Hi I am a 38 yr old female I started having sudden bouts of diarrhea at the age of 15 , was told it was ibs , had my liver checked they said it is fine and no signs of cancer never had an colonoscopy, I do have episodes of bleeding and her over the past week my stool is extremely watery and orange in color no fever haven't traveled outside the US ever we do have a history of cancer in the family . I have pain around my rectum and tail bone and my entire abdomen seems bloated slightly. I don't eat a lot and I drink Pepsi nonstop I know it is bad for me but it seems to keep headaches away. how can I stop the stomach upset immodium completely stops any bowel movement for two days then the diarrhea returns.