It's hard to get much sleep when your brain has no off switch.
Have you ever noticed that?
We live in a culture that encourages us too worry. Commercials tell us you need a home security system or the bad man will break into your house. You need a car that phones home when you're in a wreck. The milk and meat and additives you unwittingly consumed in your school meals in elementary school are responsible for your cancer.
Psychology tells us a little bit of stress is normal—until you let it take over your life. Of course, there are plenty of times you have very legitimate reasons to worry—sick kids, financial difficulties, job instability.
Just try to temper it by dwelling on the good things, too, OK? Be thankful when the kids are healthy. When you or your spouse find the right job or all the bills are paid.
Now go get some sleep.