WOW! I have the exact same problem. Literally, word for word my situation.
I have had the problem for about 1.5 years - and it is awfully annoying.
I have been prescribed Prevacid and now Carafate. None of which help much. It alleviated some throwing up in the mornings, but otherwise, nada.
I had a procedure done where a camera was stuck down my throat, and they found I have a hiatal hernia.. but that shouldn't cause my symptoms and about 50% of all people have such. I have also been tested for food allergies & H-pi Lori. I do not have H-pi Lori, and I went on a 6 month long restricted diet for my "allergies" (everything from egg whites to pineapple). Nothing has helped.
Have you found any help?! I am desperate for an answer.