world deleted bug

 Hey, I play minecraft in my notebook and I havent seen that my baterie was going to 0 (so my notebook turned off). When I put the notebook on the power and start the game, my world wasnt there, it not appear on Worlds, but the folder of my map is inside the .minecraft. What's wrong? Why the game isnt reading my world? I spent a lot of time creating my things and I dont wanna lose my map. I've already reinstalled the game and put my world inside the new .minecraft but nothing happens.