Your problem seems to be due to severe reflux Eat small frequent meals every 4 hrs dont increase gap between meals for more than 6 hrs donot lie down immediately after meal . wait atleast 1 hr . (sit upright or walk around ) Avoid water during meals , preferably take water in between meals, Avoid excess tea coffee carbonated drinks fried food .and spicy food Do regular exercise for 30 mins every day Avoid Stress .Do yoga/meditation.  take proper sleep Drink plenty of liquids approx 2 to 3 liters per day in between meals rather than during meals You can try anti reflux pillow while sleeping Pls follow these lifestyle changes and get endoscopy done to assess the severity of reflux disease.