短語 lose sleep over something 可用來表述一個人因某事而感到擔憂、有壓力從而失眠。這個表達常以否定形式出現來勸說人們不要有太多壓力。
I know changing your degree is very stressful， but don‘t lose sleep over it. The university will make it very straightforward.
So you got a parking ticket. Don‘t lose sleep over it. It’s not that serious.
Sleep on something “睡在某物上” 的意思是睡一覺，暫時不做考慮，等想好了再答復。
“Do you want to invest in my mobile app?”
“It sounds interesting but let me sleep on it. I‘ll give you an answer by the end of the week.”
I‘m not sure whether we can afford to get a new car. Let me sleep on it and I’ll make a decision tomorrow.