Jesus, DJ, I thought you were making a joke about all of Wasted's chocolate cake and pizza talk.
I'm no expert, but my understanding is a heart murmur is basically an unusual sound in the rhythm of your heartbeat.
Can mean something serious but it usually means nothing.
Not uncommon with people your age and younger.
My sister-in-law had one that led them to discover a minor defect in her heart.
They fixed it with no ill effects at all. That was 20 years ago.
My wife had a slight one during one of her pregnancies. Meant nothing and quickly disappeared.