lose sleep over
Worry about, as in It's too bad the experiment failed, but I'm not going to lose sleep over it. This expression, often put negatively, alludes to actual insomnia caused by anxiety. [First half of 1900s]
Words nearby lose sleep over
lose one's temper,
lose one's touch,
lose oneself in,
lose out,
lose sight of,
lose sleep over,
lose the thread,
lose time,
lose touch,
lose track,
losel