You have my sympathy Orchard.
I had debilitating panic attacks for many years from my late teens into my mid-20's. My 'thing' was that I thought I was going to throw up when I had a PA (mostly in crowds). So I started eating only really benign things like carrots and avoiding crowded situations. It was truly horrendous and I became very thin. I used to walk five miles to and from work in London to avoid the tube. I hated meetings and would get there super early to get a seat by the door. I just hated my life and thought that my healthy body should go to someone who was sane and not be wasted on someone as pathetic as me. My friends had no patience with me as I couldn't sit in restaurants, I hated any sort of social situations and the idea of going to the theatre - well, it was never going to happen.
I didn't think there was a cure. I took BBs for big occasions (I sometimes had to make presentations at work) and they certainly helped for a time. I had a highly pressurised job and people around me fell like flies with nervous breakdowns. I sometimes wonder if my panic attacks saved me from a worse fate (ie., breakdown) because I at least had some release in these attacks which left me exhausted afterwards.
And then one day, the worst thing in my imagination happened to me. I had to travel on the tube, no way out of it. The train was packed to the rafters and we got stuck in a tunnel. I said to a tube worker who happened to be next to me (I was in the carriage next to the driver - my safety net) "how long will we be stuck for" and he replied "dunno, love - could be hours". That triggered the worst panic attack I have ever had. It was utterly horrendous. I thought "this is it: I'm a goner" and the panic kept flowing and flowing and it peaked and then peaked some more. I looked around wildly in panic and everyone else was just reading their papers, annoyed by the delay (which I considered a life threatening situation because I might die of panic). I sucked in breath and thought I was going to faint. Luckily nobody could see me as we were literally crammed in like sardines. And then - after a good 20 minutes of this I didn't faint or puke or die and I started to suck in less air and try to breathe. After 40 minutes of this, I started to actually feel normal. After another 20 minutes I took out my paper and read it.
When we finally pulled out of the station, I felt such a surge of relief that I had 'survived' my worst fear. Since then, I have been mostly ok. I still get them from time to time but I know how to control them and I know that nothing will ever be as bad as that tube ride and hey, if I could survive that, I could do anything. (Well, not anything - I still sit in the aisle at the cinema)
I have gone from a size 8 to a size 14 but I am so happy now. I actually associate thinness (for me) with illness and I relish life, food and doing things that I was always so scared of.
I accidentally faced my fear and it worked for me. I suppose that's an extreme case of accidental CBT.
Good luck to all the sufferers out there.
And BTW, I hate fucking carrots these days! 