Thanks very much, deleting .Xauthority worked like a charm!
For those of you not finding .Xauthority: It might be the case you changed your password from the console instead of doing it from the GUI, or something else screwed up. Anyway, when that happens it is possible that your personal data hasn't been mounted because the login screen couldn't use your old password to do so.
The procedure here is to execute from tty1 (Ctrl+Alt+F1 at login screen will show up the console):
then, to mount your data you will need your OLD password. After doing so, you will find .Xauthority in your home folder. Delete it!
Now hit Alt+F7 to return to your login screen. Login with your new password and welcome to your desktop again.
Hope this helps!