Hello @LiterallyMiguel, and welcome to the forum!
Unfortunately, @NotBob is absolutely right.
For a very long time, Krita offers tools to help avoid these hard landings of users, in Krita you find them under ‘‘File’’ >> ‘‘Save Incremental Version’’ CTRL + ALT + S and ‘‘File’’ >> ‘‘Save Incremental Backup’’ F4, so a simple shortcut used a few times an hour and your pain wouldn’t be as deep as yours is right now, but Krita can’t help if users refuse to make use of them.
Or, what happens also very often, users “assume functionalities”, like Krita’s crash recovery, which has the very unlucky chosen naming “autosaves”, but how it works and for what it is, is described in Krita’s manual, reachable via F1, everyone could know what it does.
Here, and in many other topics, I describe how to create a safety cushion for your future work with Krita, but you have to make use of it, without you acting nothing changes, and you’ll fall on your face again:
Michelist