Gamemode Swich

I have a HP Pavilion 23 and it crashed while playing a world. When I rebooted it I thought it would teleport me back or remove something from the inventory, BUT NOT SWITCH GAMEMODES. That world was my achievement/normal survival "Let's Play" world. It also removed the name of it.
This also happed when I updated to 0.11.0 on my Fire HD 6.