Another option you could try would be one of the beta blockers, in a very low dose. It won't do anything much for the psychological aspects of the anxiety, but it might help block the physical symptoms. I've just started a low dose of propranalol, which seems to be helping me so far.

Talk therapy differs in its effectiveness for anxiety disorders, too. You might look into something like CBT or even one of the anti-phobia therapies for your SA. If you look at SA as being like a phobia, that might make sense.

Hope that helps. Good luck to you.