I'm 30 years old, female and I had a colonoscopy procedure around May 2011 and results came back as negative. I'm still seeing blood towards the end of my bowels. Usually the last small bowel is covered with bright red blood and I've noticed that it has gotten worse since the colonoscopy. Should I be worried? What are the chances that this is colon cancer? My blood pressure been low like 100/66 and I'm anemic. I feel very weak after my bowels but I'm not constipated or anything. Please help.