I've posted many times on this subject, but it's cured me.
I keep on looking into research into the link with Coeliac Disease, Gluten and anxiety and it keeps coming up time and time again.
http://en.wikipedia.org/wiki/Gluten-free_diet
Coeliac Disease stops your stomach from digesting food properly and you can become vitamin deficient, especially the B vitamins and we all know that B vits help to keep a healthy nervous system.
I am calmer, relaxed, head clear, not dizzy, almost feel like I don't need to breathe, my pulse as I type this is spot on standard 72bpm.
It may cost a bit more, but isn't it worth a try to get better. It may not be the full answer to your problems like it is mine, but anything that helps is better than nothing.
Please send me a private message if you would like to try it and I'll try and help you as much as I can. I'd really like to know how many people will give it a try and if you get better.