at wit's end
at (your) wit's end
so upset that you do not know what to do.
I have a problem that has me at wit's end, and I'm hoping you can help.

[TahlilGaran] English Idioms Dictionary ▲

at one's wit's end
to be in a worrying or stressful situation where you have no idea about what to do next
I was at my wit's end about what to do for my sister's wedding.

[TahlilGaran] English Idioms Dictionary ▲

at one's wit's end
adj. phr. Having no ideas as to how to meet a difficulty or solve a problem; feeling puzzled after having used up all of your ideas or resources; not knowing what to do; puzzled.
He had approached every friend and acquaintance for help in vain, and now he was at his wit's end.
The designer was at his wit's end: he had tried out wings of many different kinds but none would fly.
Compare: AT A LOSS, END OF ONE'S ROPE.

[TahlilGaran] English Idioms Dictionary ▲