They're not in the folder, and I did a search.. nothing came up. I also checked the recycling bin, nothing is there. I really don't think I could've deleted them, and no one else has access to my computer.

I had everything in a playlist, and paused it for a second. Then later when I opened the window back up and tried to play a song, it said the file was missing. And then I realized my library was empty.

Strange.