stop giving him shit, he aint messing about(i dont think)

mate, ive had EXACTLY what you are talking about, the exact same thing definate, all those thoughts, and it i was 16 when it happened, its SCARY shit, but it only happened really bad to me once(after a short break), i kept smoking and dont get it anymore.
u might not feel normal for a while, but my advice would be to honestly just try your best getting on with shit and you should eventually just fall back into place in a way.
id like to know what the doctors would make of it, u should definately go if u want to, i never did but would like to know what they said.
just dont be too worried i think thats really the key thing, i sort of believed that if i stopped listening to all the bollocks ill-informed people churn out at you i didnt feel as bad as i wasnt worrying