First: Do Not write Anything to that disk!!
You need to take it out of the laptop and connect it to another system, either with an adapter cable or an external hard drive enclosure.
Then run install one of the many recovery programs on the host system and and see if you can get your files back and copied to a safe place.
GetBackData is liked around here, but there are some good freeware options as well
GetBackData
http://www.getbackdata.net/freeware links for looking through:
http://www.google.com/search?hl=en&client=firefox-a&rls=org.mozilla%3Aen-US%3Aofficial&q=freeware+data+recovery&btnG=Search
