Thanks for writing your query.
After reading your post, it seems that your symptoms are due to gastritis
and peptic ulcers.
I would advise that you should take an antacid like Omeprazole
40mg once a day before meals along with Domperidone
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 self medications, especially pain killers and steroids
6.Drink lots of water daily.
I hope this is helpful to you.