Public speaking nerves are almost universal, and the audience usually sees a fraction of what you feel.

What you experience and what the room sees are two very different reports. Inside: a loud heart, a dry mouth, the certainty that your voice is shaking badly. Outside: somebody speaking slightly fast. The gap is enormous and reliable, which means the thing you are most afraid of, looking visibly terrified, is mostly not happening.

Ask a friend afterwards what they actually noticed. The answer tends to be nothing, or one pause you had been agonising over. Keep that answer and use it as evidence before the next one, because the feeling will lie to you again.