Welcome to HCM
We understand your concerns
I think you may not have any problem except some minor fatigue
relatd issues. You are going to find out when you visit specialists. Heart beat rises when you exercise body, but if there is actual growling (murmer) it will not be audible outside, then you must feel other symptoms associated. Dizziness
, blackouts etc might be associated with but more associated with fatigue. Fear about diseases also increases heart rate
and causes dizzy halucinations. Don't worry. Let your specialist determine. You do your job and enjoy. Good luck.