We've had this a few times recently with our year 5 girl. Last night she got herself worked up about an upcoming music theory exam and screamed and cried for about 2 hours. Her teacher was unfair, she didn't understand anything, her teacher was awful, she hated us, she hated her teacher, we hated her...you get the picture, I'm sure.
DH and I took it in turns to sit with her and try to talk her down, but I would have happily walked off and left her to stew at one point. I said early on that we weren't going to force her to do the exam, but she only started screaming that we wanted her too, to which I replied that it seemed a pity not to when she'd worked so hard towards it. Then she screamed for half an hour that she didn't want to wait to sit the paper; she wanted to do the exam right then and there!
I know it's important to keep calm but has anyone found any way of calming them down quickly? Last night she woke her sisters and brother with her carrying on.
Also do you punish yours in any way for this kind of behaviour? I was thinking she might need to go to bed a bit earlier ( usually about 8:30) to catch up on the sleep she missed from last night.