world gone after tablet died while i was playing on it.

some type of rca for tablet. I was on my tablet playing minecraft pe and it died. I then turned on my tablet and opened minecraft pe, and the world i was playing on was gone. I didn´t delete it so i dont know where it went. i looked in the files of the tablet under file manager and it showed the game has 4 worlds on it but the actual game says it only has 3. can you help me?