I Can't Sleep

Right now it's only 9:45pm est. so it's not quite bedtime. But I'll probably be woke until at least 3 am.

As some of you may know, I worked evening for 12 years. So I was used to going to bed at 3am and waking up at 11am. Now, I work a normal day job and this is killing me. Yesterday I had to leave work because I was falling asleep. That's the first time that's happened.

When I first started working days, I was cool. I adjusted fairly well, or so I thought. But about 3 months ago it started. I fall asleep as soon as I get home and sleep for 2 hours. Then I'm up half the night and get 2 or 3 more hours before work.

Can anybody out there recommend a way to get my body on a permanent sleep schedule? I would greatly appreciate it.