It sounds like you're doing the right thing - not just by following the great advice here, but by keeping her calm and quiet. You may want to add a multivitamin to her feed and some electrolytes (Chick Saver, Pedialyte, Gatorade, etc.) to her water, just to give her system a boost. If she's having trouble eating, you can moisten her feed a little by adding some of the electrolytes to it, too.
Stick with her ... you'll be amazed at the strength and tenacity of these little birds. It's really not surprising, when you think about it ... after all, they DID start out as dinosaurs!