Hello
I had gone through your question very diligently and I can understand your concern.
Looking at your short description your symptoms could be caused by any of these conditions
Acid peptic disease like 
stomach ulcer Liver or gall.bladder disease like gall stone
Inflammatory bowel disease Food allergy If you can provide me more relevant information, I will be able to help you better like your age sex and complete medical history like diabetes or if you are taking any medicines 
Have you seen aby doctor
Meanwhile please follow these guidelines
 you should avoid fatty fried spicy and junk food 
 You can take anti acidity medicines like 
pantoprazole or omeprazole with antacids
 Avoid smoking and alcohol
 Have plenty of fluids, fresh fruits and vegetables
Exercise as much you can easily do, like walking or swimming.
Hope this helps you 
Please feel free to ask for more clarification I will be happy to help you 
Best wishes