Hi welcome to Health care magic forum.
As you describe you had bad stomach pain after eating anything, and an urge to go to stools, and there is blood in stools. There is a history of carcinoid
tumour, of iliocecal junction.
It appears to be irritable bowel syndrome
, or amoebic colitis
for which it is to be treated now. If there is no responce, you have to consult a gastro enterologist for screening about the relapse of the cancer.
First you consult a physician for treatment of commen causes.
I advise you to follow some diet recommendations as avoid taking more of spices, junk foods, and oily foods, to minimise the irritation to the gut.
Wishing for a quick recovery.