Work insomnia!

On weekends, I sleep great. If I have to wake up early for church, I sleep great. If I'm on someone's couch and get to sleep in, I sleep great. I literally sleep great every single night, EXCEPT the nights before work. No matter what I do, nothing helps. For some reason, it's always only the night before work. Does this happen to anyone else? It drives me crazy cause those are the nights I actually need to sleep good, yet I can't. I spend ALL night tossing and turning.