please i would like to ask is that colon cancer or not ??.. i have blood in stool ..most of the time Constipation and sometimes Diarrhea . ( always with pain in my butt )feel fatigue all the time vomiting ,,, feel full sometimes while i didnt eat ,,gasses in my stomach i also have blue patches on my body painful stomach ache and lower back pain ,, and i have a history in my family (lung cancer )please how would i know that is colon cancer or not