This is a very serious injury that needs to be evaluated by your vet. These types of injury's can cause many painfully and dilapidating issues for your girl as well as neurological problems.
Please call and find a vet open in your area now, if none are open consider a emergency vet or hospital for emergency treatment. In the meantime, keep her warm and keep fluids in her. Unflavored pedilayte will help.
I wish your girl the best, XXXXX XXXXX us know how she is doing.
If you are sure the vet has OKed the treatment then you can continue the treatment until Monday but if she is still unsteady I would definitely get her examined. If finance's are not a issue I would advise getting her checked out today. I understand weekend vet visits can be expensive so if this is a issue follow the vets original orders and have her looked at on Monday for a full examination.