Is my dog schizophrenic?

I've seen things past physical vision all of my life, but I'm not schizophrenic. I just wonder because I'm sure there are no dark things in my apartment anymore so I don't know what he's looking at? He's afraid of a lot and he often hides behind the chair in the living room. Right now he running around as though a spirit were screwing with him and chasing him, but I see nothing negative around him. He hides in the dark a lot, which I would think something that sees demons/negative extraterrestrials/spiritual beings would avoid. He was just in the bathroom and I turned on the light. Now he isn't going in there. Could he be possessed? I doubt it, but i suppose it is definitely possible. Could there be worms in his brain that is messing with his mind? Now he's in my parent's dark bedroom. I'm going to go turn on the light in there too.