DS is on day 3 of nursery and is nearly 1yo. According to the books and the workers he is settling in really well and absolutely having the time of his life, and when I pick him up he is really smiley. However the moment we come home all he does is cry and scream and arch his back and want to be put down, and then I put him down on the floor to play with him and he is just repeatedly banging his head on the floor and crying lying on his face. Is this normal!? I completely hate it and I have no idea what to do about it. He is now asleep after getting home at 6, so could it just be that he is really tired? He's never been like this at home with me