People are entitled to comment on your speech, on your looks, on your clothes. But when it comes to your deep, deep value, nobody else should ever be judging you. Only you can be your own judge. Be your own good judge, strict judge, and then you will not be nervous when you are facing them.
So, next time they applaud your speech, do not take that applause very seriously. And the next time they criticize your speech, do not take that very seriously. Just take all criticism or appreciation as objective feedback, nothing more than that. Don’t be too serious about it.