What Causes Abdominal Pain And Dark Spots On The Colon?

I Have been having abdominal pain on my right side for three years now. I ve been to the emergency room several times now, and have been checked for appendicitis about 5 times. Tests came back normal no appendicitis, but my white cell count is always extremely elevated. Last time it was at 22, it is always in that range when I go in experiencing pain. Last time I went a ct scan with contrast was done and the doctor told me he saw dark spots on either my colon or intestines, I can t remember which. All this said, colon cancer is my biggest fear. I haven t had the money to go to the doctor although I hope to be able to soon. Is there anything this could be besides cancer? I m only 26 and I m terrified at this point.