Hi cwillett03,
Welcome to the Forum.
Perhaps what you did was click that
Rename this PC button in
Start > Settings > System > About but that will not alter your User Profile's Username.
I posted an Article the other day to help Users who want to change their current Username.
It's a little tricky to do, but if you follow the instructions given in the order given, you should not have any trouble achieving your goal. As a precaution though, before starting you could create a System Restore Point to back up the Registry, and if you want a System Image to fully backup everything including files etcetera.
The Article can be read here:
https://www.windows10forums.com/articles/how-to-change-your-username-in-windows-10-home-editions.62/
Regards,
Regedit32