What keep you awake when you are sleepy?

anxiety . my wife is pregnant. this is our 3rd child. she is constantly unable to sleep. her sleep is very restless. and mine too. and I know why she is worried, it worries me too, but I am worried about her condition now. The fact is that our eldest son will soon go to college, and he is not even going to write an introductory essay. at school, this was never his forte. And now he is postponing everything until the very deadline. he does not understand the gravity of the situation. my wife is very worried about this, as I am, but in her position it is especially harmful.