Was the vet you went to a vet certified to work on rabbits? Not all vets have taken classes and worked with rabbits, they need to be certified for that. If your vet is not, youll want to look up exotic certified or rabbit certified vets in your area and go to one of those instead. Your vet should have helped you out much more as they should know stress can kill a rabbit, and that not eating is a sign of stress and/or pain
Has she eaten anything yet? If not, try giving her most favorite treat. If she does not take that, youll need critical care or pellet mash. To make pellet mash, you just need pellets and water. Make a liquid goo out of a mixture of water and pellets, and fill a feeding syringe with it. Give your bunny a drop or two under the lip, and see if she will swallow it. If she does not (lets it drop out of her nose or lip), she needs to be taken to another vet as soon as possible as she has the beginning stages of stasis