Several hundred songs have disappeared from my saved music library. They appear to be removed randomly. As I was listening this morning at about 3am EST, I noticed that my music was not playing in the correct order anymore (as I was playing recently added songs unshuffled). I just assumed that shuffling had just somehow glitched on and didn't think anything of it. But this evening I went to my library and saw a majority of my music collection missing.

Please let me know what I can do to resolve this. My music collection was very important to me and Ill never be able to rebuild it fully.