Still No Sleep

My son is back from the beach and my worries are lessened, but I still can't sleep.  I toss and I turn.  Every little noise wakes me up.  I thought I actually heard something rattling around in my closet.  I'm actually a little bit thankful they've cut my hours at work, because I feel like a zombie.  I haven't felt this paranoid and anxious in 20 years.  I feel like he's back, always right behind me.  I don't know what to do.