I have the same thing.........and just had a full cardiac workup........it's the GERD in my case....and it's bad. It's also scary, because the pain does radiate to the back, shoulder, jaw and even my tooth a few days ago.
My Doc says it's sooooooooooo similar you can't tell the difference unless you do the cardiac work up to rule the heart out.
WHen in doubt, check it out !
I've had GERD, IBS, Hiatal Hernia and Esophagitis most of my life but never like this. This is really miserable.
It got a lot better after about 5 weeks of meds, and TIME, but I ate some Chocolate for 2 days in a row and BAM it was back on me in a vengenance.
Check out your heart...............then you'll have peace about it whatever it is.
BLESSINGS