my world got reset

my world i have been playing in for about a month now was just about to go to the en corrupted upon opening, so i logged on to the world and it sayd could not load world i pressed ok and tryd again the game crashed, so i opened mc win 10 again go into my world and I'm back at the spawn holding an empty map i go into creative mode and go to were my base is and it's gone whole world reset to origale seed (teiga village preeset seed)