Given your age ..it may be case of some obstruction in your food pipe... get a barium meal study i mean A simple xray after swallowing of little bit of contrast ..This will rule out the major pathology. ..
rest causes of your problems may be gastritis. .simple antacid. .and proper food habit ll help ..less spice oil. . Low caffeine (tea n coffee ) intake .. SLIGHT head up rather than flat Lying ... vanilla ice cream is great in gastritis .take tab ocid dsr twice daily