You just deactivated your FB account.

Deleting FB account is slightly more complicated. After you have deleted it, don't try to login for months to check out if it's gone.

To permanently delete your account:

1. From your main profile, click account in the top right of Facebook.

2. Select Settings & Privacy, then click Settings.

3. Click Your Facebook Information in the left column. If you have Facebook access to a page in the new Pages experience: Click Privacy, then click Your Facebook Information.

4. Click Deactivation and Deletion.

6. Choose Delete Account, then click Continue to Account Deletion.

7. Click Delete Account, enter your password and then click Continue.