Thanks for writing your query.
After reading your post, it seems that you might be having gastritis
An Endoscopy may be helpful in confirming.
I would advise that you should take an antacid like Omeprazole
40mg once a day before meals along with Domperidone
along with digestive enzyme
preparation containing pepsin and fungal diastase after meals will have added benefits.
Following precautions will be helpful :-
1.Avoid spicy and oily foods.
2.Avoid being empty stomach for long periods.
3.Avoid mental and emotional stress.
4.Avoid smoking and alcohol, if any.
5.Avoid gas producing foods like peas, cabbage, legumes, etc.
6.Drink lots of water daily.
I hope this is helpful to you.