The following story is only interesting to read if you like it when bad things happen, or if you don't have a trustworthy backup policy in place. By trustworthy I mean that each backup you take must be tested with a test recovery job. Only tested backups will prove useful when you need them. So go read our Backup and Restore documentation chapter then learn how to setup Barman for handling physical backups and Point In Time Recovery. Get back when you have proper backups, including recovery testing in place. We are waiting for you. Back? Ok, let's see how bad you can end up without backups, and how to still recover. With luck.
I've been asked about my opinion on backup strategy and best practices, and it so happens that I have some kind of an opinion on the matter.