Deleted.

So I loaded onto my minecraft world as usual, and when I logged on it had reset everything. I had none of the iron I had collected or any of the loot from the village i stole from. It was just all gone. So i then decided to save and quit to see if it was just a one time thing and when I loaded on I was still in the same place.i then decided to try and die. I died and whent back to my death spot but there was nothing. All my stuff is gone and I caht find a way to get it back. Thank you.