The best advice I've got is that over the next few days you'll have time to cool off and try to present your confusion to her- it's not fair for her to take your child and split w/o making an attempt at working things out, and she probably knows that. You two should be able to have a reasonable discussion soon, hopefully. Try not to get too down, because it's still early.

I can see that it's seriously painful for someone to do this, but there is obviously some reason she feels this way- maybe this will turn out to be good for you two as you find out things she's apparently not been able to represent.

Good luck.