Unusual symptoms with gallstones or gallbladder disease?

I've been having stomach problems for a couple of years, mostly in the form of nausea, discomfort and mild pain on the right of my upper abdomen after eating anything containing fats. After determining that I didn't have an ulcer and putting me on a drug to suppress excess stomach acid, my doctor eventually referred me for an ultrasound scan.

The scan showed that my gallbladder was very tightly contracted even though I had been fasting. Consequently, the radiologist and surgeon believe that I probably have gallstones or a damaged/diseased gallbladder and I am waiting for a date for surgery to have it removed.

What concerns me slightly is that everyone says that the usual symptoms of gallstones are frequent bounts of severe cramping pain in the right side. I have only experienced this once, and it didn't last more than an hour or so (although it was extremely painful). My usual symptoms are much vaguer and milder, although still rather debilitating and unpleasant.

I've also started to feel pain in my lower abdomen as well now.

Has anyone else experienced additional or unusual symptoms with gallstones, beyond the classic symptoms of a typical attack?