This is Gastric upset . Can be easily treated . You need good diet protocol as well as medicines . I'm sending you a good dietary protocol and you have to consult in private for the prescription medicines .Drink lots of water. Avoid Spicy foods. Avoid fatty foods. Avoid oily and fried food. Eat smaller meals . Never remain hungry for long duration . Have 3-4 serving of fruits every day. Never skip a meal. Always have salad with meal. Even if you skip the meals, have some salads.Watch your Caffeine and Tea intake. Reduce Alcohol intake and Smoking. Never lie down after a meal for at least 30 minutes. Reduce weight if obese. Avoid Carbonated drinks. Make sure you dont have Constipation, eat plenty of fibre rich foods, Do exercise for about 30-40 minutes a day. Avoids certain foods like peppers, beans, cauliflower etc.