My dog is acting as though his back is sore - arching his back, yelping if I touch him. He can still walk. If it is a disc problem, it will only become worse as he continues to move around. Early intervention is key in possibly avoiding paralysis. Ask your veterinarian about treating your dog with steroids and crate rest.
Many dogs do recover if they are just given ample rest and time for their bodies to heal.
You might also check to see if anyone in your area does acupuncture on dogs. My dog is on crate rest for the next 4 weeks. Steroids often help a dog to feel better before they have really had sufficient time to heal. As your dog feels better, she may want to run or jump or move in other ways that could cause even more damage. It is very important to keep her as quiet as possible until her body is truly healed.