Hey @Kirstie_renae, welcome to the Spotify Community!
In this case, just make sure to follow these steps: https://support.spotify.com/article/can-i-recover-a-deleted-playlist/.
You might also be logged into the wrong account. It's possible to create multiple Spotify accounts, each with their own login details, saved music, and subscription.
Check to see if you have any other accounts.
Have a nice day 🙂