For the 7 Oaks PG programme, I don't have direct experience but a friend's child went through it and she said the teachers were quite nurturing and patient, especially with the younger ones still adjusting to a group setting, so overall she felt it was a positive start for her child. On the sleep crying and head shaking, I would bring it up with your PD just to be safe, because even if it turns out to be nothing, it gives you peace of mind and the doctor can rule out anything that needs attention.