Lost desktop settings

Hello,
I’m running 12.1 gnome in fallback settings because it suits me better. While I added a new shortcut at the panel, the computer freezed for a while and at the next login I lost the 2 panels and everything on them. Such as the watch, the shortcuts,icon of the network, volume etc.
I tried to reinstall packages such as gnome-panel, gnome-session etc. Is it possible to recover the panels and alla the sortcuts I had?
When i switch to standard from fallback i have all the settings at this session. But switching back to fallback gives me a desktop with no panel.
Thank you in advance.