Every 6 Wks I Hsa A Cycle Of Low Hemoglobgin

every 6 wks i hsa a cycle of low hemoglobgin ( like down to 4),have type 2 diabetes, acute anemia. The drs think that it is a colon bleed. Black stools, extreme fatigue etx. I ahve to get flod infusions every 6 weeks amd I have notbeen abel to tolerate the prep Ay t this point I'm will to try the tube down my nose. pleas advise if yiu have any input to add..