When trying to load into my world it crashes

When trying to load into my world it crashed after going into it. It shows me in the bed sleeping I press leave bed and then it shows the home page of Minecraft the tip box and in the background me still in the bed I tried uninstalling and reinstalling tried copying the world nothing seems to work my girlfriend and I have been working on this world for over a year and would be devastated to lose it. We also reached out to Mojang on twitter a little while ago. Pleaseeeee help us. Thank you