I co-own a website called yourooo.com
Today I wanted to change my domain name, so I went to Dashboard >>setting and found some boxes that had “yourooo.com” and changed it to “2thepoint.com” (I knew that would be that easy to change domain name, but was just playing around).
Now I am not able to access yourooo.com/wp-admin nor 2thepoint.com/wp-admin and login to undo the change.
These forums are for WordPress.com hosted sites only. Since we do not have access to self-hosted WordPress.org sites, we are unable to provide any direct assistance to your issue. I would reach out to your site host for help.
If you want to know more about the differences between WordPress.com and WordPress.org you can read this document: