"cannot sleep because of worry"

Nights Kept Awake by Worry: Overcoming Anxiety-Induced Insomnia

Every night, the moment your head hits the pillow, do all the worries you held back during the day flood in, leaving you tossing and turning? There are far more people than you might think who sigh while checking the clock until dawn, unable to break the endless train of complicated thoughts. If you want to get a sound night of sleep tonight, shall we break that cycle together?