inventory vanished

Hello, i was in the nether when i died. I returned to the place less than 2 minutes ago but i only found my equipments ( head chest leg and feet). all my inventory vanished, i looked  everywhere arround the place but i did'nt found it. no lava nearly me. After 30 hours playing it's really disgusting to loose all you're tools and weapons with max enchant and rarity, ore, blaze rod etc... without the possibility to load an old save, my feeling is i've been screwed.

I was playing offline so maybe you can't help me, but please for other player solve that problem.

 

Thanks to you.