I'm losing track of this thread.
You say you didn't go to the doctor, yet you say he prescribed something for you?
Anyway, do you eat normal food or are you vegetarian, or a health food fan or what?
For example our Jewish friends don't eat pork and I wonder if that's why there's a higher incidence of Crohn's Disease (inflammation of the gut) among the Jewish population.
Also, Linda McCartney, Davy Jones, Maurice Gibb, Robin Gibb and Donna Summer were all veggies who died young. (The Gibbs both developed colorectal cancer) and now Angelina Jolie has ditched her vegan diet because she's fed up of being ill.
PS- some years ago we were always being told to include plenty of roughage in our food, so I used to sprinkle crumbled Weetabix over my meals, and was sometimes plagued by terrible intermittent abdominal cramps, once I was even taken to hospital because they suspected appendicitis, but it wasn't that.
Eventually after some months the penny dropped and I stopped with the Weetabix and the cramps also stopped..