I opened iTunes, and all of my music (apart from the songs purchased from iTunes store) and playlists were gone. I hadn't updated iTunes or changed it any way that I can think of beforehand. Not sure which version I had, but I hadn't updated in a while.
Following these instructions I updated iTunes, I tried to follow the rest of the steps but no luck in getting my library back. There's also a file in my iTunes folder called 'iTunes library (damaged)'.
So confused about why this has randomly happened, any help would be much appreciated as I don't want to have to re-add all my music if I don't have to.