I think its a type of coping skill you are using perhaps. You start feeling antsy, and to prevent the thoughts of anxiety, if you can talk alot, sorta "out talk the anxiety beast" , perhaps it wont happen. Perhaps you could change your dialogue - keep on talking, but say calming, soothing, safe statements (you could have them written on a 3 x 5 card and keep this with you, because sometimes its hard to remember good thoughts when we start to feel anxious). This might also help eliminate the shaking once you tell your self to "shut up cause no one else is talking". If you put this "negative self statement" into your train of thought, and "make it appear that talking is wrong for you to do", perhaps your anxiety then manifests itself in the shaking. Would it be possible for you to take a brisk walk when u start feeling this anxiety coming on? That would release some of the energy you are obviously building up to have the "shakes"., and release endorphines that will help calm you.

I think all of us who have dealt with anxiety/panic have dealt with the talking too much and too fast.......just as we see people without this dx do when nervous !