Im 16, male. I can remember since age 8 or 9 being, i now realise, delusional. I recall running aevery time a car passed by because someome would take me away, I was also afraid other people could hear me think, so i used to supress my thoughs around others, as well, i used to be suspicious of a microphone in my retainer recoring what i said. I also, until recently, talked to my stuffed animals and was convinced they were real people, they talked back to me, though not audibly. As if the words were spoken right into my head. I used to try to feed them regularly and spent hours alone talking to them. Occasionally, it would occur to me that they may not be real, this thought would make me sick to my stomach, I actually threw up a few times. And send me into a depressed state for a few days until the thought went away.
A year or so ago, it occured to me again, and it occured to me a way of finding if it was real (having them identify a card before i saw it) but i couldnt bring myself to look at it the first few times.
When I finally did, I became quite depressed for a month or 2 and felt very detached from my surroundings.
Over the last few years, ive also been doing poorly in school, dropping form A's and B's to C's and D's. Mainly because I find it unbearable to sit and concentrate on working, i feel like i have to get up, and just walk. I take frequent bathroom breaks just to walk there.
Sometimes i also pace around in my basement for a while, other times i just sit still for long times and find it hard to make myself move. when im pacing my mind tends to race, i feel like i need to do something, i cant focus, single words, sometimes a few pop in and out of my head. I get a feeling i cant quite describe, it doesnt quite feel bad, rather, powerful, and i find it quite useful if i channel it to drawing or writing music which seems to be the only thing i can focus on for long periods of time.
Another strange habit of mine which has lead me to beleive i may be schizophrenic, I rehearse conversations in my head, almost constantly. It starts with a simple thought of me telling someone something, but it contiues, and i lose track of things and keep talking to this person in my head for a while, maybe 20 minuts or so, they dont say much, usually nothing. Sometimes, when i consider seeking help i imagine telling this to a therapist, and when i reach this part, i tell him how even this now, is just a rehersal, and that even that last line was and so on. So this post has played out in my head for some time now, though never gotten past that last part.

For a while I was doing well, but lately i cant concentrate. My grades are slipping, and my parents are becoming increasingly frustrated with my habits and i only have a few friends since i spend most of my time at home doing nothing.

Im considering seeking help, though im not sure how to go about it.

Thoughts, Suggestions?