I started getting anxiety attacks when I was 18.
I was smoking a lot of weed and had a couple of bad experiances with ecstacy in quick succession... and it all snowballed.
I had my first anxiety attack at a party when everyone had gone to bed. Anxiety's a strange feeling, especially when it's knew... you just really don't know what's going on or why you feel scared or on edge... but you do, and when you can't shake it with logic and reason you can start to panic even more.
I threw up and rocked back and forth for the rest of the night.
I stopped smoking weed pretty much immediately after that night, and even had to stop drinking too... mainly because every time I tried, every time a sip or a toke even passed my lips, the anxiety would hit me.
But when I stopped, it actually started getting worse.
I got a couple of full blown panic attacks, and they where horrible and much 'wilder' than an anxiety attack for me. Anxiety attacks are persistent but sometimes subtle... which can be really really annoying if you're trying to sleep.
But my panic attacks were on a whole other level.
I had to start seeing a drug councillor and she taught me a lot of good techniques and got me in to meditation for a while. And I was really lucky, cause my college allowed me to do my exams in a seperate room with a supervisor who would take me for walks and pause the clock if the anxiety started surging.
I have made a full recovery since, and I haven't had any non drug related anxiety for a long long time.
And even when I have, i've been much better equipped to deal with them
But i've still gotta be careful what I do. I can't party as hard as some people, I avoid confrontation, I make effort to take 'me time' if i'm getting too stressed.
It's all a balance you learn.
I only get chest pain right as I fall asleep. It's like I get a rush in my heart the moment I'm about to be in dreamland

It's very odd and insomnia ensues.
Yeah I used to get the same thing really badly. I'd be absolutely fine until I tried to sleep, then i'd be just about to slip off and it'd hit me
I also went through a weird stage of getting them sometimes after eating
