Hi there...to control gastritis you have to start modifying your lifestyle and take oral medications. Try avoiding spicy foods and junk food completely. Have multiple short meals about4 to 5, instead or 3 big meals. Do not starve for too long. For now you can take tablet pantoprazole 40mg, once in the morning, half hour before your breakfast for few weeks and see. Start relaxation habits like yoga and meditation. If you done feel any comfort in 1 week, then kindly consult a general surgeon for further evaluation.