Hi - I can chime in there with more supportive, you're-not-alone words mostly. But also the benefit of time -- my son is now in 5th grade, and while he still has occasional meltdowns/tears, they are much less frequent or dramatic than when he was in 2nd. Helping teachers/principal understand over-excitabilities (and learning about it myself) has really made a positive difference. As has careful teacher placement :-) That said, its not gone, and he isn't "typical" in a classroom either.

I agree with Sue, though, about it being a blessing in disguise that her feelings are visible, and you're able to at least try to help and understand!