About four months ago, I had sever itching of the anus. It was around on and off probably a few weeks and itched like poison ivy. It could be related to creatine I had been taking that tended to make me have diarrea. I haven't had that in a while. More recently, when I try to take a stool I have a yellowish mucus, sometimes with a few drops of blood in it. Sometimes I don't even have a stool until later. I am seeing a specialist about it but am nervous I have colon cancer, since there is very little blood and sometimes just mucus and no blood like I would expect with colitis. From what I say above, is there any indication what it might be?