Randomly deleted writing

So this is the second time I’ve opened a scene and the whole page is just blank when I KNOW I never deleted or moved it. I’m really frustrated right now trying to figure out where my work went. I’ve been using Scrivener since 2013 and this is the first time something like this has ever happened. It’s set to autosave every 2 seconds and it creates a backup when I open and close projects (saves the 5 most recent). I searched back through my back up files and the scene just isn’t there, probably because it disappeared many many backups ago. I’ve been working on this story since 2015 and work on it pretty much every day. I was going through chapter by chapter editing it so it could be beta read and now I have to start from scratch.