Thanks for writing your query.
Your abdominal pain
seems to be originated due to gastritis
You can take antacid like Omeprazole
20 mg once a day for relief.
You should follow some precautions like :-
1. Avoid spicy/oily foods.
2. Donot miss a meal.
3. Drink at least 8-10 glasses of water daily.
4. Do regular exercise in fresh air.
5. Avoid mental/emotional stress.
6. Donot self medicate especially with pain killers and steroids
7. Decrease intake of tea and coffee.
Take light meals for few days.
I hope this is helpful to you.