Hallow Dear, I believe, you are a male. You have in fact answered your own query in your question. The gastritis and stress is due to excessive stress. You need not be stressed out mentally because of masturbation practice. It is absolutely physiological and about 90 % men in the world masturbate in their life. So you need not feel guilty about it. Masturbation does not prevent male-female sexual relationship. There are some individuals who even after having a regular sexual partner also masturbate and are still fathers/mothers of off springs. Masturbation, like sexual intercourse is a physical exercise. Hence physical fatigue after excessive masturbation is known. If you are physically week, have good high protein diet, physical exercise in open air and practice yoga. After masturbation, some physical and mental rest would help you. Practice breathing exercises (pranayama). There is nothing in your life pattern to loose confidence. Boosting up your moral will give you relief from all these symptoms. You may need a couple of sessions with counsellor or a mentor. Your wife-to-be can be your good mentor. If acidity is bothering you too much, for the time being, you may take daily one tablet of Pantoprazole for few days and avoid spicy food. I hope this helps you. Dr. Nishikant Shrotri