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I am Dr. Snow, and I can try and help you today. This kind of thing happens all the time. With an injury like that it is possible to have some trauma to the structures in the neck. I doubt there will be any long term damage to the vocal cords though. Often time we will do soft food and rest for a few days after an injury like this, but it sounds as if she is eating and acting normally. The other good thing is that she is whining, so she is able to make some noise.
Sometimes, veterinarians will prescribe antiinflammatories for a few days after this type of injury, but since she seems to be doing well I suggest just monitoring her closely for any pain (evidenced by reluctance to move, helping on movement of her head) or swelling in her neck.
Please post back with any further questions!