Thanks for your question on HCM.
I can understand your situation and problem.
Since your cardiac and pulmonary examination is normal, no need to worry much for major problem.
In my opinion you are having GERD (
gastroesophageal reflux disease) mostly.
It is due to laxity of gastroesophageal sphincter.
Because of this the acid of the stomach tends to come up in the
esophagus and cause the burning central
chest pain.
It is also common in Addison's disease.
So GERD is the likely cause in your case.
Try to follow these steps for better symptomatic relief.
1. Avoid hot and spicy food.
2. Avoid stress and tension.
3. Avoid large meals, instead take frequent small meals.
4. Start
proton pump inhibitor.
5. Go for walk after meals.
6. Keep 2-3 pillows under head in bed to prevent
acid reflux.
Don't worry, you will be alright with above mentioned lifestyle modifications.