I've noticed that sometimes when my stomach is upset and I have something to eat, I not only have stomach ache, but I also have shivers. I'm not cold because I happen to be in a warm room and covered up with a blanket. I have had an issue with cold intolerance lately, but that doesn't factor in here. I've tried taking the Donnatol that they gave me when this happens, but it doesn't help. Anyone else had shivers with stomach ache?