stomach issues are mostly food related.In your question itself you have given two important issues.1 you are a nervous person,2. you cannot eat chilly , I am adding two things more which can cause problems to your stomach and rest of your intestines. 3. spicy,oily,fried items 4.you have to have your food in time.
so if you want to have a comfortable ,problem less stomach and intestine you have to care those important organs by avoiding spicy,oily,fried food.have your food before you feel that you r hungry.sleep well at night,reduce your tension,
If you are suffering from this problem for many years do not hesitate to undergo upper GI endoscopy
. A good doctor or good medicine cannot cure your problem.you have to analyse urself and modify your food habits and lifestyle