nerves are on edge(It must have been around two in the morning when Marc shook me whispering harshly that someone is trying to get into his bedroom window. I hoped it was just a nightmare, or his nerves were still on edge. Quietly we slipped into his bedroom and listened to the sounds of scraping at the window edge! – нервы у него ещё не успокоилисьmysteriousuniverse.orgART Vancouver)
be at one's wits' end("At last the little money which I had saved began to run short, and I was at my wits' end as to what I should do." (Sir Arthur Conan Doyle)ART Vancouver)