Hi i have a hige problem since monday night , there is blood in my poo and i cant keep anything in since monday i tried eating yesterday but vommited?

Blood in stool: Vomiting and bright red blood in bowel movements may be from a gastrointestinal tract infection which caused bleeding from hemorrhoids or from serious inflammation of the colon. Bleeding from diverticulosis or a tumor usually doesn't occur with associated vomiting. If bleeding and vomiting persist, go to the hospital emergency room for prompt examination. For milder symptoms, go toprimary care MD.