jono,
Thanks for the post.
At age 32, unless you have a strong family history it is very unlikely to be your heart causing these symptoms. Additionally, with that work up, the chances are exceedingly small. I would follow your doctors advice and look elsewhere. Also, losing weight will impact your overall future risk and if you are overweight could be contributing to GERD.
good luck
However, I have not visited a doctor for this problem as I never gave it a second thought, but to be on the safe side, what should I do to be sure? I do not smoke, drink minimally and my BMI is 27.
Greatly appreciate your inputs on this, thanks!