Try searching for the document in Windows:
To find a lost document: Search for Word documents If you can’t open the document, or the content in the document is damaged, see How to troubleshoot damaged documents in Word.
Find lost files after the upgrade to Windows 10.If you're looking for information about how to recover other recent Office files, see the following articles: Restarting Word to open AutoRecover files.You can try to recover an unsaved Word document by: