If you have no backup, you could try using Windows Explorer to navigate to the folder with your documents, then right-click the folder and click Properties. When the Properties window opens, click the Previous Versions tab. That might help - no guarantees though.
When you've gotten your system back like you want it, I urge you to get yourself an external hard drive and a good 3rd party backup program. You can set it up to do everything automagically at the time and frequency of your choice. 1 TB external hard drives are about $50 these days and a really good FREE backup program is the Easeus Todo Backup Free. That can save you a lot of time and frustration the next time something like this happens. Sooner or later it happens to all computers for one reason or another.

Good luck.