stage fright 
noun [mass noun]
Nervousness before or during an appearance before an audience: an attack of stage fright...
- I wasn't feeling well, and I was nervous, I get stage fright like you wouldn't believe!
- But for all her love of dancing, she suffers badly from stage fright.
- We've all been in situations where there's some anxiety or stage fright.
- signaller
- signal light
- signal line
- signally
- signalman
- signalment
- signal molecule
- signal/noise ratio
- signal pad
- signal peptide
- signal plate
- signal post
- signal reaction
- signal red
- signal sequence
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- signals intelligence
- signal station
- signal strength
- signal strip
- signal-to-noise
- signal-to-noise ratio
- signal tower
- signalwoman
- signal word