Definitely sounds like your little girl needs to see a vet asap, even if she is acting healthy. If you cannot find a rabbit-savvy vet, then perhaps you could take her to one who is close in the interim, and ifthey don't feel confident in treating your bunny,then ask if they would be willing to do a phone consult with someone who does treat rabbits on a regular basis. They should be able to give you an idea of what the problem is, at least.
As far as cost, my vet charges $50.00 for an exam, along with the cost of medications or treatment that might be involved, if any. There is a rabbit-savvy vet here in the city - too far away for me to have access to him, unfortunately - and I believe his rates start around $70-$80for an exam. The cost depends upon the vet and the clinic, but the basics in this area seems to start at $50.00.
Another option...some vets will also set up a payment plan for people who cannot afford the entire cost at once. If lucky, you might be able to find a vet who would be willing to do this for you.
I hope your little girl gets better soon....hugs and prayers for her...:hug2: