I am a ninteen-year-old female, and last year I started experiencing some strange symptoms. In May of '08, my menstrual cycle was irregular for the first time. My period was very heavy and lasted for almost four weeks. Sixteen months later, I am still experiencing this problem, but because I have a friend with the same condition, I have not been very concerned. However, about eight months ago I started having bowel- related symptoms that are worrisome. First, I had constipation for a week, followed by a bout of diarrhea. This alternating cycle of constipation and diarrhea has been happening for the last eight months. Also, I have noticed small amounts of blood from my rectum on several occasions and I have slight abdominal pain. I also swear that I can feel several small growths inside my lower abdomin. I know that colon cancer is very rare for someone my age, but I am still worried. I want to know if my symptoms are caused by a women's health related issue (such as endometriosis or a kind of reproductive cancer) or if I have colon cancer. I am really scared because, if this is colon cancer, I have let it get way out of hand and it is probably past an untreatable stage. Can someone give me advice on what to do next?