I've been having some dull pains in my stomach and on my back. They don't feel severe and they can and go very quickly. However,

what's really scaring me is the change in the color of my stools.

They started out as light yellow and hard. Now they're starting to look mustard yellow. Also, I've been farting and burping a lot.

I think I need to see the doctor, but I'm worried that it's some kind of cancer. I am 33 years old, I am 5'7 and I weigh about 300 lbs. at the moment. I've been healthy for most of my life depite my weight problem, but I want to know if that's part of the reasons for my recent illness and should I considered having

my weight surgically altered, since it will take a real long time to lose it naturally.