The File Is Corrupt .Psd

Hello! worked in photoshop with psd file, suddenly turned off the computer. Can't remember when I saved before, maybe 5-7 minutes before. Happened automatically restart. When I reopened the file, it already consisted of one layer in black color. The file size is not changed. And the preservation of its consistent shutdown of the computer. Ie file somehow merged all the layers preserved before shutting down. How can I return the file to its state before this glitch? Copy no. Program Advanced PSD Repair did not help, well I don't really count, because maybe the problem is with the file other. Tell me what you can do in a similar situation. Thank you.