<s>[INST] Hello. I have been having stomach problems since my gall bladder was taken out in 2004. 15 to 20 minutes after eating i get severe cramps in my stomach as well as a chilly feeling and my heart sometimes races. This usually happens everyday after a meal. The pain goes across the stomach above the bellybutton area. Thank you for your help. [/INST] Hi. Thanks for your query. This is a classical finding in patients suffering from Colitis. Colonoscopy and ultrasonography would help to find out the probable diagnosis of a problem with the transverse part of the large bowel called colon. Biopsy may also be needed. All the symptoms of pain-racing heart rate, chilly feeling all go in favor of this. Also, to consider the possibility if IBS, meaning irritable bowel syn Chat Doctor.  This can be said if the investigations are normal, and getting a proper treatment. Get an appointment with your Doctor and get a reference for a Gastroenterologist. </s>