Some people are able to treat some, but not all, of their symptoms by finding out if they have "trigger foods." But this will not cure or treat physical things like hiatal hernias or weak LES, or esophageal spasms.
I'm not a fan of alternative medicine claims that they can cure everybody, but some simple things like keeping a food journal, which is easy and free may help you find some (not all) answers. (See many posts and explanations in the search box at the top of the page.)
I believe in seeing a good gastroenterologist. They're not likely to have you look for trigger foods, although my allergist did. However the gastro can do approved, validated testing to find the cause of the problem, where alternative practitioners can't.