AL, get it off your mind and off your chest. talk to someone, write it out in a journal... put it all down so you can take a good look at everything and put it in perspective. Eat a well balanced supper, then drink some warm milk, or eat cheese and crackers, or celery, no sugar, don't elevate your heart rate after 7 pm and get some rest! google tryptophan containing foods, they help promote relaxation and sleep, like turkey and the warm milk and stuff suggested above...
I've got a pic heavy post coming, that'll put you to sleep!