An ultrasound is nothing to fuss about unless you are very tender, then it can hurt some when they press on you. The hidascan involves getting a line put in so they can give you a couple of injections, one of which may make you nauseated--it did me. But other than that, it's just a matter of laying still for 30 minutes. So it's not a big deal either. So if you wonder about the old GB, it's worth having them done to get it checked out. My advice is always to have it done when you are having problems. My gall bladder symptoms would come and go and when I had my tests run when I was not having any symptoms, I came back okay. Several years later, with the exact same symptoms, I came back very not okay.
IBS Sufferer, if it's not your GB--and you can have too much bile in your stools from just having IBS--then you should still ask about Welchol. That's what I take to absorb my excess bile and that keeps me from having D. Someone else on this board who had a good gall bladder got put on it or Questran one to stop the D. I always recommend the Welchol because I know it works for me and for my m-i-l; some people on here have complained that the Questran gave them bad gas/cramps, something I haven't had a problem with on the Welchol. But, as you know, not everything works the same for everyone.