A family of Microsoft word processing software products for creating web, email, and print documents.
If that is a Word document, open Word, then click the File button at the top, on the resulting window, do you see the document you need listed in the recent list, and if so, are you able to find the document in that listed location on your drive.
If not, if you use OneDrive to sync your files online, log into OneDrive in a web browser (https://onedrive.live.com/), are you able to find the file synced there.