Hi steve11.  A colonoscopy is the way to go.   hemorrhoids can be one of many reasons. stomache pain can be cause by colitis. inflamation of the bowel wall. So before you start thinking cancer. wait for the colonoscopy. If it finds anything such as polyps you will be given a diagram and points  like a, b ,c depending how many things may be found. not all polyps are cancerous. look at a polyp as a kind of skin tag on the out side on the body. everyone gets them.  at least one way or another steve11 you'll know if you are clear which I hope you are.  If it's a full colonoscopy ask for sedation. it doesn't put you to sleep it just makes you relaxed.  Other than that Steve11 just lie on your left side knees up and think of England.  hope all goes well and you get the results you want.  good luck.