I can only tell you the tests that I have had. They took a stool sample, blood, an Upper GI (where you swallow the yummy barium), a colonoscopy, and the other upper endoscopy or whatever, a ct scan and ultrasound. I think I'm fogetting something. I don't have the chest pains, sometimes I do, but not all the time. They haven't found anything as of yet except for a couple ulcers. I get a lot of throat problems I think, but who knows. I do know that chest pain can also come from your back and stuff, any back problems? Who knows, I know my pain is in about the same spot though and they just look at me like I'm nuts. My doc said most likely IBS but I'm not sure. Did they try stool samples and try you on a clear liquid diet and all that? I didn't wait long and have had all these tests done within months, I'm surprised your doc has been shoving this off for a few years. Maybe get a new one

Also, when I have concerns I go to *******.org where doc's can answer your questions (with a $15 fee of course) but you can browse through questions already asked for free, worth a shot. But quit worrying about cancer, I'm thinking they would have found that by now. What about eliminating things like lactose? Tried a diet change? Also are you on and medications? I know (you won't have this obviously) but my birth control medicine played a big part...