Gastritis after 2 month decadan use.

I am 23 year old male .  in 2016 January & February I used steroids (practin & decadan) and stopped suddenly in march. After one month In April I feel chest haviness after eating small and gastric problem . I went to a cardiologist and after 30-40 days treatment I feel better. But in 2017 January chest pain and gastric problem are back. I went to gastrologist. Endoscopy reports said I have erosive gastritis. CBC and LFT tests are normal. After taking PPI and other medicines I feel better again. But I am sick again in July 2017. (heavy upper chest  ,gas ,anexity,  and tension. And sometimes constipation. Currently i am taking Durab-ls, librax, providac, and shelax powder for excess gass.  and constipation. Also i lost 2-3 kg weight in these years. How to reverse all these symptoms completely. I want 100% relief for lifetime . i can do anything for my health.