As I know these issues come up a lot here, I just wanted to let everyone know that I had excessive gas, red blood with BM twice in one day and flat / thin / low-caliber stool and I just got back from a colonoscopy that didn't show so much as a polyp - so for those of you freaking out about this - as I was - know that its probably nothing serious - especially if you're under 50. That's not to say don't go get it checked out, but I thought it would help to know that in my case - and many others - there was no cancer diagnosis waiting for me after the scope.