Since Christmas DS has really developed terrible temper tantrums, when he is told no mostly but sometimes over washing his hands or teeth brushing. Now he has just woke screaming, with what seemed like a night terror and it’s took almost an hour for him to calm down, screaming at the top of his lungs that you think he is going to be sick. I’m certain I heard my neighbours bang on the wall. Have tried everything. They did calm down a bit after Christmas but have started up again the last week or so. Is it a phase?