Hi Ellen. Take a deep, deep breath, dear. I know how frightning this can be. Canceritis (every, ache, pain, bruise is cancer, to us) really sucks. I have had this problem, more than once. Do you have hemorrhoids? Mine was due to hemorrhoids. My sister had the same problem, as well, and hers was due to diverticulitis. Crossing my fingers, that it is a minor issue and that everything will be fine.