Get well soon. One of the biggest causes of death, especially for males is being too stubborn or too scared to get things checked out. Me included. Have a speedy recovery!
First, congrats. But this is strange, another firefighter? I remember fifteen years ago in a programmers gathering that we found out every one of us played a musical instrument. But this is a little stranger, it seems ludicast and you both worked in the same and had heart problems too.
I think people are scared it will turn out to be nothing and they'll be embarrassed or something. But the fact is, no one knows that it's nothing, until a medical professional checks it really is nothing. There's no shame in that.