LoL I'm the opposite, I have no problem being up in front of a crowd when I'm acting and in fact find it fun, but the second I have to be myself (public speaking etc) it's rolling panic attacks and I will avoid it at literally almost any and all cost (I say almost as there was a couple of times I got summoned as a witness for a court case and I could have done without the complete waste of time that was and the residual panic attacks that followed for the next couple of days).
It was one of many things that had to go and that I will probably never pick up again because time.