Im having some issues

I was traveling very far on my world and when I started to head back I died and the game crashed and when I opened it up and tried to start my world that I worked very hard on and the game wont leave the loading screen for opening a world and I tried closing out the app and I shut my phone of and back on but it will not go past the loading screen for that world and all of my other worlds work but not that one. This is my favorite game to play and I worked very hard on that world so please help.

Blade a C about Minecraft: Pocket Edition, v1.1.5