I have gone through your query and understood your concerns. In my opinion it might be associated with esophagus
and the other cause may be heart related. I advice you to take antacids like ranitidine
or ppi like pantaprazolee for this. If your symptoms still persists after the usage of the above drugs then you need to consult your doctor immediately to rule out other heart related causes. Mostly it may be due to GERD
and if it so then you need to take particular treatment prescribed by your doctor after examination. Thank you.