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The excel autosave function is not working properly. I had an excel book that I had been preparing for days. I had the autosave mode ON, so I did not worry about manually saving right, thinking of course that it would autosave. So I  was working on it today and my computer shut down because of a battery shortage. So I plug it in, turn it on again and my excel book was not the same. It keeps loading a version from 3 days ago, but all the modifications I made after that point were gone. I've tried checking the version history, but according to it,  there were no versions from those days. I've also checked the OneDrive Recycle Bin, nothing either. I've come here  after  consulting with the technical support them to seek some  help. Is my work lost forever? Please help