If you really did save it, you can open Word and from the File menu select "Open recent ..." and it should show the last files you were working on. If you did save it, the saved file will show up and you will be able to open it from that menu. Another place to try is under the Apple Menu, "Recent Items," which will show programs and documents recently opened. You can open those things right from that menu, even if you don't know where they are on your Mac, then you can save them to a location you want.
One place to look for tmp files is in your Documents Folder, inside the Microsoft User Data folder. Look for tmp files there or inside any of the folders within that one, especially folders with names like "recovery" or "autorecovery." Also, look in your Trash, especially if there is a folder there called "Recovered files/items" where sometimes tmp files end up when a computer is restarted. Some tmp files, however, cannot be opened or used, but sometimes they can be opened.