I had a long saga with biliary pain. Three years worth. So frustrating. Had every test out there, and all were normal. Compounding my case was that I got breast cancer, so now everyone's wondering if tumors are what's causing the pain (those tests were also normal, thank God).
My GI doc finally sends me to a surgeon. He won't take the GB out because the tests were normal, but also tells me that if indeed a normal GB is taken out, there's a 3% chance of that person developing irrectractable lifelong diarrhera.

His exact words were, "if that happens, you'll wish you had the GB pain back, believe me".
So I lived with it, but it was awful. I had gotten so bad I was taking prilosec twice a day, and lots of maalox tabs in between. The colicky pain would wake me up at night.
Last June I was home sick with pneumonia. Bored and in lots of pain, I began probing some more on the internet re: biliary pain and there was one thing I came across that caught my interest. The fact that statin drugs can rarely, but sometimes, cause biliary pain. Having a strong family history of hyperlipidemia on both sides of my family, I'd been started on a very low dose of lipitor. I decided that day to stop taking it, and within a week my pain was almost gone completely and I no longer needed prilosec or maalox. My doctors were astounded (and slightly

). I didn't care as long as that awful pain was gone.
Truthfully, I still have a small bit of discomfort there, the same pain I've had for 3 years now. But it had gotten way worse on the lipitor, and since I've been off it it's back to the level it was before I went on it. My own theory is that there is a little something wrong there (probably with my GB or Sphincter of Oddi) which isn't enough to show up on tests. Whatever it is got way worse with the lipitor, but now it's back to baseline.
The moral of the story: look at your medication list when you are dealing with this type of pain and see if there's anything you're taking which could be causing the pain. And remember: taking a GB out isn't completely risk free. Some people, probably a small minority, get this diarrhea, and some still have the pain afterwards as well. I'm glad my surgeon had the sense not to take mine out.