A state of nervousness about performing some action in front of a group of people, on or off of a stage; nerves; uncertainty; a lack of self-assurance before an audience
I did some guest-speaking at the middle school last year, and I experienced some stage fright before and during my first presentation.
Stage fright is a feeling of fear or nervousness that some people have just before they appear in front of an audience. Acute nervousness associated with performing or speaking before an audience. nervousness felt by someone who is going to perform in front of a lot of people