Hi ! Good morning. I am Dr Shareef answering your query. With the kind of history you have narrated about going into a kind of shock following substantial amount of bleeding per rectum associated with abdominal pain and loss of appetite, I would suggest you to see a gastro enterologist/general surgeon at your earliest for a proper physical examination and related investigations along with endoscopic evaluation if need be for appropriate management. It might not be possible otherwise to suggest you treatment for such condition over the net. I hope this information would help you in discussing with your family physician/treating doctor in further management of your problem. Please do not hesitate to ask in case of any further doubts. Thanks for choosing health care magic to clear doubts on your health problems. Wishing you an early recovery. Dr Shareef.