Connie probably hit the nail on the head here. I have a hiatal hernia, and have been dealing with that since before my cancer diagnosis, and a lot of times, i have had the same issue/feeling.
I was on Kapidex for it, and that was an amazing med. I could eat almost anything and never have heartburn. Well then my stupid insurance decided i didn't need it anymore, and now I am trying different meds, and have that stupid feeling/issue back.
So I will hope for you that it is just acid reflux issue like for me and connie above, and hope they give you some good meds to get it under control!