iTunes Music Folder Disappears and all MP3's Deleted

I listened to my favorite song on iTunes this morning at 10, closed the application out, went to the Clemson Football game, just got home (computer was left on and nobody has access to it). I am connected through DSL. I opened up my music folder and it said "Music folder not found" so I try it 3 more times, the music folder appears, and there everything is set back to normal. All 1,200+ songs are gone. So I do a search and find that my entired Music folder has been moved into my Picture folder. How did this folder move by itself???



[edited: found the files just want to know how it was moved, please change title admin]