Welcome to the GERD forum. I agree with Joy and Alcie can give you some serious info on it too. Basically Most of us have the heart like symptoms at some time during our battle with this disease.
I'd recommend still raising the bed frame up some for times you may not be using the PAP machine, but still lying in bed. Plus it will help the PAP keep the acids and such where they belong. I didn't think I could get used to a raised bed, but now my wife and I prefer it and have issues when traveling. If you are not happy with your care....Find someone else! The biggest problem seems to be with doctors with this disease. Their lack of giving us good service and wanting to help us for extended times seems to be an issue I see on here a lot for newcomers. We seem to get the "you have GERD/acid reflux, take this and have a good life". There has to be a way of giving us our lives back, whether meds, surgery, or both and following through with us to make sure we are having quality lives. I am sure there are many other diseases that are treated the same as us, but I am a bit sensitive to the issue while recovering in the hospital from an esophageal perferration repair. LOL!
Yes there are many just like you, but don't give up.
Nissen 6/06 and 5/09