Phrases Talking About Stress or Anxiety

I'm feeling nervous.

Meaning

I am feeling anxious or apprehensive.

John: I have a big presentation tomorrow.
Alice: Oh dear, <b>I'm feeling nervous</b> just hearing about it.
John: I know, it's a really important presentation.
Alice: Take deep breaths. I'm sure you'll do great, but <b>I'm feeling nervous</b> for you!