Well it sounds like indigestion to me. Try the home remedies first.
Try this. Mix Dahi+zeera+ few dried coriander leaves and eat this mixture 10-12 tablespoons twice a day (it really works when i get stomach ache and diarrohea). Also have Ispaghol. If that doesn’t do the trick, then usually one tablet of Omeprazole (half and hour before breakfast) helped me when i had similar symptoms…