What should I do if Apple Music shows no subscription?

Today I opened my apple music app to play music and it kept saying this content is not authorized. I searched it up and it said to sign out of my apple id and sign back in. I did that and now the app works however now it says I do not have a subscription ( I do ) and ALL of my music that I had put into playlists is gone. Some of which are 25 hours long, so you can see why I am frustrated. How do I fix the subscription part and is there a way to recover my music??

[Re-Titled by Moderator]