My 12 month old son who used to be very social and would go to anyone now screams if I am not holding him. He will occasionally go to his dad but only if I am out of the room and he has no problem with going to child care 2 days a week. I spend heaps of time with him playing, reading etc but also encourage independant play. He has become very clingy and won't even let his grandparents hold him. I can't even make a cup of tea without him crying to be picked up. Is it his age or could there be something else bothering him??