J.H.
I have never been through what you are growing through so I will just give my 2 cents from my perspective. I think your daughters reaction is probably normal. What she has known for so long is different and her little mind is probably so full of questions. So I would maybe just tell her at a 5 year old level exactly what happened. This will probably eliminate some of her questions and give her time to ask her own. Also I think this is a good lesson on true beauty lying w/in a person instead of how they look. Ask her if she thinks mommy acts different or treats her different. In this you can let her come to her own conclusion that her mommy is just as wonderful and loves her just as much even is part of how she looks has changed. Life is full of changes so instilling that in her now is a great opportunity.