Dc3 (of 4) suddenly (last Thursday) stopped wanting to go to school. It's quickly got to the point where she won't get on the school bus, and cries her heart out when I take her and have to leave her there. We've talked about all the possibilities (bullying, feeling friendless, not managing with lessons...) but she just says that she misses me when she's at school, and the thought of not seeing me for the next four or five hours starts her crying. At home she's fine - not clingy or demanding, she does her homework, no problem. It's a smallish school, all the teachers are very supportive, and she's got an older brother and sister in the same school, so it's not like she's on her own there, and I don't think there could be anything going on that somebody wouldn't have noticed. Things are getting out of hand now, though. She's starting to feel embarrassed about being the kid that cries, but she's also starting to identify with the role and I'm worried that if I don't sort this out, things are quickly going to get worse.
What am I missing? what questions should I be asking?