Wit's

I was at my wit's end as to how to act.

I was at my wit's end when I heard the news.

I'm at my wit's end with this difficult problem.

I'm at my wit's end.

I'm at my wit's end. I can't think of any solution to this problem.

I lost my job and I have no money. I'm at my wit's end.

To tell the truth, I am at my wit's end.

I was at my wit's end.

I was at my wit's end after having failed to contact her.

She was at her wit's end what to do.