Minecraft Server disappears after computer crash?

So I have this creative world that I built and play multiple times. When I was playing today with my sister, my Surface 3 died. So I did what anybody else would do, plug it in the charger. My screen went black, but my sister was never kicked out. I told my sister to get out anyway just in case. When my Surface 3 finally turned on, I realized that it exit my minecraft and when I got back It disappeared. I can't find it anywhere, even in my files in my library. I'm pretty much asking how to recover it. Thanks…

P.S I also have windows 10, but I doubt it did anything.

Um windows is kind of laggy that might be why it crashed and you can log in and out of your account and it should pop up in your servers box thing and this happened to me and I did this and it worked so just try it and if it doesn't I don't know might be something with your computer

This is a LAN world you are talking about, correct? If it's an actual server, then it would be in the server files.

IF IT WAS LAN, it could have possibly not auto-saved, therefore disappeared when your computer died.