I don't think it's abnormal emotional intensity, just a bad behavior pattern; lots of children do this at some point in my experience. What you need to do is treat it as a training problem. When you drop her off, if she's fussing, say goodbye calmly and just turn around and walk off-- don't say anything else, don't have a sympathetic look, don't turn around or linger, or any of it. On the better mornings, reward her with an extra hug. The behavior will eventually vanish, because there won't be any percentage in it.

Striving to increase my rate of flow, and fight forum gloopiness. sick