I have had a total colon removal and rectum removal and have an ostomoy bag. Recently have developed pain in lower left region where my colon would have been. I have no appetite and have lost 25 to 30 lbs. since August 10. I also have heart disease and when the abdomen swells it makes me feel tight chested. Please advise on which dr. to see: gastro, cardiologist, origional colorectal surgeon.