Since it's a long problem.. You better Consult nearest physician for proper examination and evaluation... Consult them they will help you further with that try eating several small meals instead of three large ones whenever you can...Avoid foods that irritate your stomach, especially those that are spicy, acidic, fried or fatty... avoid coffee,tea etc... Stress may make your gastritis symptoms worse...Stress may be hard to avoid, but you can learn to cope with it. If you have trouble relaxing, consider calming activities, such as meditation, yoga etc...sleep with head raised position and have dinner at least 2 hours before sleep..