A mountain was in my farm and my farm was in my house and half my stuff is gone.

I walked far away from my house and bed to find a village. Once I fond the village I put dirt bloicks with torches on each turn so i could find it again because it was far away from house. I died like 40 times trying to get back because i didn't put the torches in the right direction. I finally found my house and there was a big freaking mountain at my farm. And then i went in my house and the part of my farm replaced by the mountain was now in my house. I lost half of my storage chests. i lost the more valuable stuff like my 8 diamonds 3 stacks of iron, quarts,  diamond armor (my legging had good enchantment on it).  This is my first world which is why my house is bad.