THIS IS A MAGICAL TOOT. IT WILL WIPE ALL YOUR FILES. IT WILL ALSO EAT YOUR HEAD.
Okay, not really, but if the thought of losing everything on your phone, computer, tablet, or whatever is more panicking than, "Ugh, gotta restore from backup," then you are definitely overdue for a backup, friend.
Sadly, there's little to be done for your head. If you want anything from your brain preserved, say or type or draw or otherwise express and record it while you can.
THEN MAKE A BACKUP OF THAT, TOO.