I'm so sorry to hear about this! I haven't read all of the posts so someone else might have said this aleady but I'm going to say it again
. Before you give up on your baby why don't you try and find someone that could take her for a few months. Clean the house and see if it makes a difference. It's always possible that you could both be allergic to something else allergies can come and go pretty much whenever they feel like it. It's odd that you both are having the same attacks, especially when he's at school. He should be better at school because the dog isn't around not feeling worse. I hope you can figure something out my toughts are with you and your family.