Pain is not something we invite. Pain is not something we wish to experience.
There are levels to pain. Mild discomfort to excruciating.
Yet pain is not an enemy, it is merely a warning. We must learn to see it as a warning and deal with it in kind.
The fear of embarrassment at the thought of public speaking is a legitimate pain. But it is just a warning, one that allows us, ahead of time, to improve ourselves, to become better at speaking publicly.
Pain is just a way of letting us know we are stretching ourselves. Without it we run the risk of running head long into danger.