i lost all the songs in my playlists

Hi applemusicuser3,

You might be able to fix your issue by turning Sync Library off for all of your devices, then turning it back on again. 

To learn how to do this, check out the link below.

Use Sync Library to access your music library across your devices

To perform the recommended troubleshooting steps via the link above, complete the steps in the section titled "How to turn on Sync Library on your iPhone or iPad."

1) Make sure that your iPhone or iPad is signed in with the same Apple ID that you use with your Apple Music subscription.

2) Go to Settings.

3) Tap Music.

4) Turn on Sync Library.

5) Turn on Sync Library on your other devices.

We recommend the steps above because they will show you how to access your music library, including your playlists, on any device with the Apple Music app and signed in with the same Apple ID you use with your Apple Music subscription.

If you’re still experiencing the same issue, then give the steps here a try: If songs are missing from your music library after you turn on Sync Library - Apple Support

Please let us know the outcome after giving the above steps a try.

Thanks for using the Apple Support Communities.

Cheers!