Help! My Apple Music Won't Play Anything

I'm having a huge problem with Apple Music. It won't play any songs or show anything in my library—everything seems to be gone! I can still search for songs, but when I select one, it says it's unavailable and prompts me to reconnect, which doesn't work at all. I've tried a ton of stuff to fix it: uninstalling and reinstalling the app, restarting my phone, signing in and out of my account, resyncing iCloud, and messing with various app settings. I've done all of this in different combinations, but nothing seems to help. Can anyone offer some advice on what I should do next?