Yup I got this way right before every guest speaking engagement, every group meeting of any kind and in my present life I get this way every court assigned heraring (one every 6 months).

What helps me is that I carry around a walkman and some cassettes with music that I like and find calming, a cassette that my therapist and I made during therapy of a relaxation visualization and I also carry around a small scented bead pillow that I can feel and smell when I need to.

Social anxiety is horrible but it does get better if you plan ahead and have come calming things along to help.

Hang in there