And yes, it's definitely a good sign that she's eating & drinking. Hopefully it's from swelling, or something else that'll resolve itself in time. Keep us posted.
:goodpost:.
@Eggcessive always has helpful advice.
If she's able to move her head enough to eat & drink, that would be the best option.
You might try a warm Epson salt bath, you'd just have to hold her head up. They seem to work well for a variety of muscle aches/strains. If nothing else...
Can she move at all, or does she appear paralyzed? Keep her warm for now. If she's not injured internally, she's probably in shock. If you have a heat lamp, you can set her up under that.