Jaz, Sounds like gallbladder. I don't mean to rain on your parade. My experience was similar in that I had an attack in my teen years and then not again until my 20's. Over time it became more consistant. The good news is that you don't have to be having an attack to be able to be diagnosed with gallstones so stop wishing for pain! Being that you have CF you are predisposed to having gallbladder problems. Have your CF doc. order an ultrasound or send you to a gastroentrochronologist who will order an ultrasound if you would rather. Just get to the bottom of it. In answer to your question about if it isn't bad enough for surgery. Generally, it's usually worse than what they can see on the ultrasound from what my surgeon said and I've heard from others. Also, once your gallbldder starts making stones it continues to make stones. This fact was important to me because I thought if I could pass them or break them up then maybe somehow I could do that and be cured. Nope. Finally, passing them is not a good idea like it can be done with kidney stones because the gallbladder passes them to the to the bile ducts which then places them in the pancreas to my understanding which causes pancreatitis. Just get it checked out and see what your working with. For some reason, chiropractors don't think gallbladder removal is a good idea. I agree with them on a lot of things but not this.