on edge

(idiom) to be very nervous about something

Example Sentence:

I am on edge waiting for the new Britney Spears album to come out. I can’t wait!

Mary was on edge because it was her first day at school.

From the News:

Disney Employees on edge Amid Restructuring

Media:

Similar idioms:

1. on pins and needles
2. have one’s heart in one’s mouth
3. butterflies in one’s stomach
4. have butterflies
5. jittery
6. get one’s hopes up
7. bide one’s time
8. fire away
9. fall through