Acid reflux?
I had really bad heart burn for quite sometime, went to the urgent care clinic, diagnostic as acid reflux, prescribed Nexium, 3 days later I was in the e.r., damn near brought me to tears, and was given an ultrasound, blood work, cat scan, and turns out it was my gall bladder. That bad boy was enlarged and the gall stones were stopping the regulation of the bile. Had surgery, and sooooo much better now.
Point here is, could it be your gall bladder as that will cause acid reflux.