Hello...... You can  take probiotics..  H pylori  is most common infection for stomach ulcer..  So get that test  done..  Medicines can only give temporary relief.. Strict diet and lifestyle change can bring gastritis under control. Take curdrice ,drink plenty of water , have frequent small  meals instead of large regular meals.Sleep 2-3 hours after having dinner . Avoid spicy, hot ,high protein containing foods like fish  .Take dal rice , butter milk .Antacids and ppi for temporary relief ....