I'm 24. Honestly, the docs couldn't find anything, so it could've been a false alarm (sympathy pains, Thinking about my dad's heart attack), or at worse an intense amount of stress...I've had a ton of that the past 8 months, and I really did spend all of yesterday depressed. That said, I had been having chest problems and asthma for the past 4 weeks...anyways, I'll save the rest for the doctors tommorrow...
Unless it turns out to be succubi, then I'll be talking to a priest.
About things that feel like a heart attack but aren't:
I once had this https://en.wikipedia.org/wiki/Tietze_syndrome
which felt exactly like having a heart attack.
It usually happens in men between 20-30.
Lasts about a dozen weeks.