Burping (Belching) problem. Plz help!

Hi, For last 3/4 months I am having Belching issue. Specifically after dnr. I have attached endoscopy report. I have gone through USG - Full abdomen and it shows Grade 1 fatty liver and other USG reports are normal. Every night I wake up 2-3 times because of Belching and I realised full of gas heaviness and pain in abdomen area which get relief after stool. If Burping starts dn it will continue more dn 150 nos. I only smoke 1/2 cigarette per day. Non alcoholic and every evening I walk min 12 kms at speed of 5.90 km/hour. Because of this issue I need to go for stool daily 4-5 times. I do most of veg diet with brown rice. My lipid profile, CBC,sugar,  thyroid profile, kft and lft profile all reports are normal which I did 15 days bck. I was prescribed pentodec dsr empty stomach at morning and before dinner nexpro rd 40. Plz suggest me medicine and dos and don't to get rid of this issue... Plz help