Megan123,
I suppose you could try a file recovery program, if your so inclined.
What it will find, will depend on several things. If the deleted files have been written over then recovery may be impossible.
I'll give a link to a Free program I've used that seems to work nicely. There are a lot of file recovery programs. Try Google
Recuva - Undelete, Unerase, File and Disk Recovery - Free Download
Good Luck