Stage Fright
Two Stroke,
You didn't say if you were a beginner or if you were experienced.
I've only been flying a year, and I get nervous if there are a lot of planes flying or if I've had a problem like a bad landing/broken prop.
My solution is to not come to the field ready to fly.
I leave the batteries uncharged, so I have to go chat with everyone while they charge up.
That usually gives me time to settle down.
Tim