DS (4.3) has had two months of schooling and has settled in well. But recently he has started talking to himself at school non-stop blocking out everybody and everything. He is non-stop repeating songs and DVDs. He always repeated things but before falling a sleep or when he is on his own, not in a public place like that. He used to be very quiet when with other people. His 1:1 and teacher both have said that they can't make him stop. This is making other children scared and although at the beginning he had few children wanting to play with him, now nobody wants to be near him. Please help, we don't know how to stop this as he is fine at home. We understand that he is obviously stressed out at school, but we can't just stop him going to school.