Did you update via the Itach app? Because that sometimes wipes your main saves for some reason (nothing I can do about it, sadly - it's entirely on Itch's end).
That being said, the weird Itch glitch doesn't wipe your autosaves. Have you tried loading those? You can find them by going to the "Load" page and clicking the "A" on the left of the page numbers at the bottom of the screen.
Autosaves happen every time you sleep, so you won't have lost much - if any - progress :)