If you had Word's auto-save mode on when you were working on this document, there should be a .asd version of it on your system (for the autorecovery location, see https://support.microsoft.com/en-us/kb/107686); otherwise one or more of the .tmp files Word creates may have recoverable content. On Win 7 systems, these files are typically stored in "C:\ Users\%username%\AppData\Local\Temp" (see also https://support.microsoft.com/en-us/kb/211632).

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Cheers,
Paul Edstein
[Fmr MS MVP - Word]