ive been going through the same thing as well, it got so bad i couldnt even be home alone. much better now, just slight physical symptoms and still a little agoraphobia, but im getting much better everyday. ive been prescribed different medications but have refused them all. some things that helped me:
1. dont eat sugar, caffiene, white bread or pasta
try to eat only organic foods if you can.
exercise!!
2. order lucinda bassets program and put the time into it
3. i recently bought a self hypnoses cd by dr. steven gurgivich a couple days ago and it seems to be helping a lot
you have to reprogram your subconscious. remember: your want is your way!