I think there might be something wrong with my two year old and dont know what to do. he doesnt act like other kids his age from my observations. He chews the paint off the walls, when he is angry he will bang his head on the wall the bookcases fridge basically anything near him, he will be playing then all of a sudden he will start screaming for no reason, he only says about 4-5 words and doesnt even point at things he wants just screams till you figure out what he wants. He doesnt know shapes colors or anything like that if you try to work with him at it he just screams and starts throwing things. When you tell him to do anything ( that he knows what you are talking about) he just ignores you. He hits, bits, pinches, and kicks. I dont know what to do and am afraid that there might be something wrong. Please help any input would be greatly appreciated.