Can a 13 Year Old Show Signs of Schizophrenia?

I was just wondering this because most people with schizophrenia aren't diagnosed until some where around their twenties. After visitng the doctor recently, I was recommended to see a shrink for some signs of schizophrenia (which horrified me) and the doctor didn't specialize in that field, so I don't know if he knew what he was talking about.

But I show plently of the early signs including some audio hallucinations (mainly crashes and banging, though I have been hearing some sort of yelping animal the past week and a half or so when no one else had heard it). I have off an on sleep disorders that flip flop from not being able to sleep at all to sleeping too much. The two switch places every... maybe ten days or so. I have always had the feeling that others could read my thoughts or had the room bugged with microphones and cameras to hear and catch my every action since I was maybe seven, though I didn't exactly use those words. As well as since I was five I have always thought that there were other people in my house watching me, including ninjas and penguins at one point.

Lately I have had the weird feeling that either I'm in some sort of dream and need to wake up and that this is not reality or that I'm maybe victim of some mind control thing and that I have been sent into a fantasy world after so much trauma along with an increasingly more flat emotions and little to no empathy for those around me in need.

I mean, is it possible to show signs of schizophrenia this early? Or did that doctor just have no idea what he was talking about (I didn't tell him all of that of course because I would have been too embarassed with my mom there)? And do you think it's likely or unlikely that I may have it (I hope not, but I just want opinions... I'm currently blaming hormones)?

My gf, who is now 38 years old but most likely also suffering from Schizophrenia also reports very early onset.
It can happen. Its called early onset Schizophrenia. I even vaguely recall a rather widely publicized case of a very young child suffering from it.

It's extremely rare, though of course possible to be diagnosed under the age of thirteen.
Here are some statistics.