I have had social anxiety disorder for all of my life, becoming much worse from my late twenties forty years ago.
I saw a psychiatrist for twenty years who dished out the usual benzodiazapines, which I have to say have kept me going and I seem to tolerate them, which goes against all the printed evidence apparently.
It was hard going to the hall when I was in, some evenings not talking to anybody and feeling really out of it and it is emotionally hard now with my wife still in even though I am totally out and "inactive" now. She understands my problem though and supports me as did many in the cong as I had known some since the mid seventies.
In late 1998 there was a really good article in the awake mag on SAD which actually caused some discussion at the hall and it surprised me to find that quite a few had this problem at varying levels. I had also found the same thing at work. Some much worse than me.
There have been some good replies and comments made here IMHO and I don't have any advice other than to echo what Phoebe said and go and talk things over with a psychologist that you feel really comfortable with.. All the best to you.