Apple Music songs gone after logging out

I logged out of my Apple ID on my iPhone 6 and when I logged back in all my music from Apple Music was gone. They were all available offline and now my library is empty. I tried to go to Settings > Music and turn iCloud music library on, since most people who have had that problem seem to have solved it that way, but it made no difference for me. It seems to be really gone because when I check my storage there a lot more available than it should be.