welcome to HCM!
Heaviness in arms and chest- first thing thatshould be done is to rule out heart problems like angina
There are other possibilities too like Heartburn
.it can be a possibility if there is history of acid reflux
and antacids may offer relief in such case.
I would advise you when you consult your physician get a basic evaluation done like ECG, Blood pressure,blood tests like blood sugar, blood counts, lipid profile
These tests will HELP in diagnosis and clear your doubts.
I sincerely hope this will help you!Take care!