My minecraft world won't load (pc)?

My minecraft world won't load. I have no mods. So what happens is either 1. It will say load world and build terrin for a bit then go to the title screen or 2. It just enters the world but there's nothing in it what should I do? Its survival and i have a good amount of stuff and builds. If you need to know more feel free to ask and i will happily awnser. Also i've been playing in LAN for majority of the time in this world.
All that happened was i died and tryed to get my stuff back but i had to leave and then i came back and this happened…

When you actually get into the world and there's nothing, try holding F3 and pressing A, it will re-load the area