Hey everybody, I really need help!  Today when I logged onto my computer for my daily bitcoin check I opened up Multibit where I house my coins to find that my wallets had disappeared completely! I had failed to back them up with a private key because I couldn't figure out how, and figured I'd do it at somepoint soon but not it's too late and my bitcoins are gone!  What's really weird is I went into the application files and the files of the existance of my 2 wallets that had bitcoins in them are not there, but my other wallets I have created that have no bitcoins in them are there!  It's weird, it's like someone hacked my computer and deleted just those 2 wallet files and left everything else.  It's very eerie and equally distressing.  I have about 39 bitcoins in total and with today's prices that's over a thousand dollars which is more than the cash I have to my name.  Is there anything I can do? Can I access them online and recover them some how or are they lost forever?  There is data on my computer of me logging into the Multibit client and accessing my two wallets but the files that house them have vanished.  Please Help!  I'll even throw a bitcoin to whoever can help me recover them if it's even possible!

List of file formats recovered by it http://www.cgsecurity.org/wiki/File_Formats_Recovered_By_PhotoRec