Random Death

I left my home, my dog was sitting on the stairs, and all my farm animals in the pen. I left on an adventure and when I got back home my dog was gone, I walked outside and all the animals were. As I went to walk back in I started falling into the floor and it said I fell from a high place. I lost all my armour, weapons, everything I had on me. and re spawned in my house. I went right back downstairs and none of my things were there