My Gallery Is Full, but my Library is Blank? (XBO, Gallery, Library, Load, Save)

My entire sims library has disappeared (XBO-S). I haven't had any crashing but my entire library disappeared Monday night. My gallery is still there and the downloads are still ticking so people can apparantly still see my gallery, but the library is totally gone, and now i can't upload to the gallery because there is an error message saying "there was an error saving to the library" so my library AND my gallery is broken for all intents and purposes. screenshots attached. please help! i will be so upset if i have lost all those files forever.