[KayLouise]

Hmm does sound like you've been hacked. If you can still log in then change your password.

Just googled and it says:
If you think your account has been hacked and you're still able to log in, here are some things you can do to help keep your account secure:

Change your password or send yourself a password reset email.
Revoke access to any suspicious third-party apps.
Turn on two-factor authentication for additional security.