I ate supper at about 6:30pm and I am now having stomach pains and cramps. I have not been constipated and I normally have thin stools about twice a week. It seems that an upset stomach after eating usually goes away an hour or two after eating. This is hanging on much longer. I am also feeling vaguely nauseous. And my stomach is distended. I know I didn't overeat, as I still eat relatively small meals since I had a gastric exclusion in 1997 for weight loss.