I desperately need help getting back some Documents that disappeared

Please please HELP! :'( I am basically crying.
I was moving some documents to a flashdrive and accepted to replace some of them because they were repeated and I actualy think I accidently replaced all my important documents with those documents or they just got deleted randomly (but they're not even in the recycle bin). It happened so fast I dont even know how it did or what actually happened. Suddenly the Documents library was completely empty.

Months of hardwork were put into those written documents. I REALLY NEED THEM BACK :( :(

PLEASE CAN ANYONE HELP ME? How can I get these documents back?

Thanks.