For the last year I've been experiencing distressing stomach problems. It started with very embarrassing sounds from my stomach, both in public situations and by myself. More recently I've experienced constant rumbling, spasms, loose stool, gas and a constricted feeling in my upper GI. I'm a bit scared since I don't have insurance and my family has a history of colon cancer. I'm 36 and I know I'm not too young to have cancer. Any suggestions?