at one’s wits’ end

(idiom) to be confused, overwhelmed, and unsure what to do

Example Sentences:

The confused student was at her wits’ end because she didn’t know what to do after graduation.

A: Are you okay?
B: No, I’m at my wits’ end!
A: Why?
B: I think my boyfriend is seeing another girl secretly!
A: Oh no!

Shawn’s wife left him, his children are always misbehaving, and he just got fired. He is at his wits’ end, and he doesn’t know what to do!