demonic or spirituality?

You may be smart in math or english...but you're not in spiritual issues...and you by far do not know "almost everything about ghosts". May I ask where such a brilliant 11 year old learns everything about ghosts??

You need to talk to your parents. That's your starting point. You are under their roof and their rules. I can't tell you to go and talk to anybody because your parents may not want you. Talk to them first.

HH

I started reading and learning about ghosts when I was younger than you after seeing the spirit of my departed grandmother the night of her funeral, Christmas eve 1964. In the early 1990's I began earnest study. Since 1999 I have been professionally involved in paranormal studies and have lectured and taught. I DO NOT know everything there is to know about ghosts despite nearly a half century of learning about them!

People can become addicted to the paranormal. Here is how it progresses:
Interest> Facination> Obsession> Addiction. Interest and fascination are not harmful. Obsession and Addiction are. I think that you are getting on the wrong side of healthy quizzical interest and are becoming obsessed. At that stage, every slightest thing becomes paranormal in opinion. A mouse in the wall becomes the scratching of a demon, a cooling floor joist becomes footfalls, a car down the road turning into a driveway casting head lamp light into a room becomes a shadow entity... reality becomes distorted - experience becomes biased.

If others are experiencing the calamity in the kitchen, the sound of pots, pans and dishes falling to the floor, then you might have a poltergeist. If that is the case, those types of "hauntings" are usually short in duration and will go, never to return, as quickly and as unexpectedly as they showed up. IF this is poltergeist activity, then do not use religion to get rid of it. NOTHING annoys a poltergeist more!. That is a researched and documented fact. Sure, the problem may abate for awhile, but when it returns, it returns MAD! Of course, that is if it is really a poltergeist and not RSPK, SIPK or more likely, an eleven year old's over active imagination.

Best thing to do - keep a journal of events and have reliable witnesses.