I am so sorry this happened. I can imagine how frustrated you must feel!
I am sure you have already looked this info over...bust just in case:http://www.healthcentral.com/anxiety/support-283147-5.html
The only other thing I can think of is to get a written assessment from your P-doc about your abilities to carry out your work responsibilities. (which you've also likely done)
Sorry I am not much help. However I am sending you many positives thoughts for a resolution in your favor!
Let us know how it works out won't you?