I'm on tenterhooks.

Meaning

I'm experiencing intense anxiety and anticipation.

Examples

• John: The results are coming out tomorrow morning.
• Alice: Oh boy, you must be a bundle of nerves! <b>I'm on tenterhooks</b> for you.
• John: I can't sleep! It's driving me crazy.
• Alice: Try to relax. I know it's tough, but we've done all we could. I'm still <b>on tenterhooks</b> waiting with you!