First, turn off your computer and don't plan on using for awhile. There's a few programs out there that could help, Norton UnErase, DiskWarrior may even find it. I can't think of more now someone else may be able to help you though. There are places that can get stuff off of your drive that was about 3 years old but they'll charge you an arm and a leg (I'm thinking of DiskSavers)