You said you login as other users and all is OK, so that's good. Don't reinstall Xfce. It won't help, because the problem is likely in your own user configuration (profile). Unfortunately I don't think there is one single "master reset" for the Xfce profile, but you can start by renaming the ~/.cache/sessions (to anything else), while not logged in to Xfce.
If your Xfce login is still broken after that, you can try renaming/removing directories in ~/.config/ - but be aware that other applications store data there too. A backup first would be wise. The directories I would start with in ~/.config to try are xfce4, xfce4-session, autostart, Thunar. But try ~/.cache/sessions first.