@unkogr0l - I'll share a secret with you I don't talk about much these days. I used to have severe anxiety that began the day before I was 18 -- many years ago at this poin. By severe, I mean it was bad enough that I lost 45lbs in two months and wasn't sleeping more than an hour or two a night. It got to the point where my Doctor was prepared to intervene and have me placed in a institution. He was seriously concerned from the weight loss and the deliria I was going through, for which I'm actually grateful now, even though the prospect scared me even more back then. Eventually he gave me surgical sedatives that helped me sleep and an SRI (terrible side effects that pass with time) that took weeks to work but helped in the long run. Annnnnyway, my anxiety was caused by a random and inexplicable fear of death, or rather, the 'whats after'. I remember an offhanded comment someone made that helped me: "As long as your hearts beating and you're breathing, then you're fine". It was actually made as a joke, but the more I thought about it the more I realized it was true. So I kept telling myself that, followed by: " I'm in control of everything else, and whatever I'm not, is meant to be'.
I think everyone will find their own path and things that work, but for me it was practicing proper breathing exercises and remembering some silly mantra. The point is, though, is that you're not the only one who has gone through it, and that just like the millions of others out there you too can, and will, make it through and learn to control it. Just don't dwell on the things in your mind that cause that nasty circle.
Hope you feel better, friend.