Pain like before gallbladder removal

I had my gallbladder removed in 2000 because of excrutiating pain with bowel movement. I was fine afterwards and until 20007. Since then, I get the same kind of pain as before I had it removed and as time goes on, I get these 'bouts' more and more often and they can last for days (although the worst of it lasts for a few hours, then it decreases and if I eat, as little as a half cracker, it starts again).

I have had all kinds of tests and scan's done but all docs tell me nothing is abnormal. I've spent over $17 000 in medical bills over the past 2 to 3 years and still I don't know what's wrong. I don't want to go out anymore, I work from home, I'm afraid to drive. When the pain hits, it goes from 0 to 100 in a matter of minutes and lasts for hours.

The tests found endometriosis and I was operated twice for this in 2008 which removed menstrual cramps and diarrhea associated with it...but hasn't helped these attacks.