Dear Enquarer I think the condition you are suffering is called GORD (Gastri oesophegial reflux desease) Here what happens stomuch content mixed with stomach acid bounces to the throat through the food tube (Oesophagous) and that happens due to some problem at the junction of food tube and stomach. I think you should see your Doctor who may send you to a Gastroenterologist. You should have some special tests done eg Barium meal
x-ray, Upper gastroendoscopy. There are treatments both medical and surgical. In the mean time please follow few advises. Do'nt eat too full, avoid hot greesy and spicy food, stop smoking
if you smoke, and don't retire to bed shortly after the meal. Kindest regards.