E.H - 2012-10-26

Please can someone help me?

I was trying to burn a DVD and when it came to converting a .mov file it asked me to choose where to save the .mpg version, it highlighted the folder I'd chosen the .mov file from, so I just clicked 'choose'. I was surprised that when doing this the percentage went way over 100%- up to about 800% finished. The dvd then didn't burn. Somehow it has just deleted the entire folder. I REALLY REALLY need those files- they were my digital art files that had taken me months to do, and stupidly they weren't backed up. How to I get my folder back? It's not even been sent to trash, it has just disappeared.