Apple Music is not showing any of my downloaded songs

Upgraded to Catalina and Music was working fine but suddenly today none of my downloaded music is showing up in my library. When I go to the actual files, they are there under iTunes, but there is now also a Music folder. So how do I get it to use my old music folder or transfer the files to the new folder? But I have a lot of playlists and metadata that I don't want to lose.