Is herobrine in my world?

So I was mining in my world, when I went out of my mine, the fence gate of where I put my animals was closed, but all my animals escaped. I was mining for about 5 minecraft days. Then when I went back my house, it was all burning. There's nothing that could start the fire in my house. Then after several days everything inside my chests were disappearing and sometimes I could see a glimpse of white behind trees. Note that I'm using pocket edition and I'm not making this up. I'm not in multiplayer