Schizophrenia?

I am 15, and I have started to think I might be schizophrenic, like my mother. Sometimes I start talking to myself but as if I was another person and think people can hear what I think. I usually think it be better if I'd just run away and never come back. and when I sleep I dream I look at myself sleeping while things are there then all turns black and then I am awake doing things like hitting myself against the wall or paralyzed while talking nonsense.