Hello and thank you for using HCM.I carefully read your question and I understand your concern.
You should not worry about.
I will try to explain you something and give you my opinion.
There are some reasons that might be responsible for hearburn.
First, you should know that typical heart pains have some characteristics.They usaly are retro-sternal pains like squizzing , tightness or heaviness. They may irradiate to both arms , neck and jaw. They last from 5 to 20 minutes.
Long lastig pains are not typocal heart pains, and in your age
ischemic heart disease is rare.
To exclude ischemic heart disease I would recommend a cardiac echo, a full blood analyze and a strees test.
Another reason of
heartburn migh be a gastrointestinal problem. So you should consult a gastrohepatologyst and maybe a fibrogastroscopi.
Also you have to exclude a skelectic problem doing a toracal xray.
After all this we can better judge what we are dealling whith and how to treat it.
Hope I was helpfull .
Best regards, Dr.Ervina.