Allergies are so miserable because it’s so hard to get relief from them when it’s in your environment. I had a bad allergy to some scented stuff at work yesterday, and it’s hard to convince people who are not bothered by it that, yes, you really do need to remove it right away or you will suffer.
I am also surprised by the dr.’s statement that it’s mild to the bunny, considering the symptoms your daughter has, but I do know that allergies are often a combination of things that push you over a threshold. Don’t be surprised if, after the bunnies are gone, she still has some allergies since it may be the combination of hay, litter, dust, fur, AND house dust or trees or some foods that are factoring in. Allergies also come on at any age.
You will miss them terribly, but you are taking care of your child and them – I’m sure you will find them a loving home. I think Sarita is in or near Dallas. Maybe she can help you get them to a good foster or rescue to rehome them.