Dreamweaver, Deleted file *CONFUSED*

i was using dreamweaver to write my css code and then all of a sudden there was a little padlock next to the css file, then the file closed and deleted itself and completly disapeared! :confused:
I dont know what happened and I dont know if I can restore the file any how, does any one have any idea on how to fix/help me?

I tried searching the whole computer for the file but its just gone, I also unticked show hidden files just incase that had happened but NOPE, its gone! :confused:

not to ask the obvious, but did you check the trash can?

yeah, I checked everywhere.
The thing is, I didn't press delete or anything. It's weird, but anyway now I am re-writing it all again so it will give me some practise! :thumbsup: