I'm not sure if you're worried here about the Word document itself, about the fact that Word shut down, or both.
Word quits on me quite a bit lately. I just reopen and see if the file was auto-saved (and I try to remember to save a LOT while I'm working).
Shutting down the computer and / or unplugging it won't help anything, and it doesn't necessarily sound like the problem is huge. Just try to describe in a bit more detail what you're worried about, and what you want help to do now.