Minecraft world crashed within 30 seconds

So just a few hours ago as of posting this my mcpe world "Buildynou soup" Started lagging like crazy and crashing within 1 minute of loading the world and this bug is VERY serious as in ENDING A LONG TERM WORLD sorry im typing in caps but im very scared the world is gone forever i have tried reinstalling and restarting my tablet so if you could fix this bug that would be amazing, i believe it might be world corruption issues