Checkout if its CARDIOMYOPATHY. May be hypertrophic cardiomyopathy
Theres three types. 2 are common. But Don't come to a conclusion unless proper diagnose is carried out.
YOU MUST HAVE THIS 2 Tests done:
NB: Pls Don't trust every doctors, they too are HUMANS!
See many, and accept which u feel right, because no one knows your own body well other than you! (Except god)
Best medicine for all is being happy. If your mind is healthy your body too gradually be healthy!