I'm 16, paranoid about my heart.

[Skux]

For the passed few months I've been eating unhealthily and not exercising as much as I used to, I've put on some weight and I'm worried.

I don't plan on doing this forever, I'm starting running every night now.

Is it possible for me to have clogged/blocked arteries at 16?

I've had multiple blood tests and ECGs and all come back negative, doctor says I'm fine.

[Noivous]

Absolutely positively and without a doubt you are fine. Clogged or blocked arteries in someone so young is so rare I've never even heard of it. Now go enjoy being 16. :D