What sort of doctor did you see? It might be worthwhile to see a gastroenterologist, or if you did, to ask for some tests. A simple barium swallow can show if you are refluxing and how high it comes up. It can also show a hiatal hernia, if you have one, and how large it is and what type.
Les fun is getting a scope, aka endoscopy. But that one will show irritation or the stomach and esophagus.
Lots more advice on the topics at the top of the forum page.
Antacid medications, ppi's and such will reduce the burning and irritation. You don't need anything more unless there is something more serious than a little reflux going on.