Becca, You seem to be doing the best you can for your little bird. Take a deep breath because that's all we ever can do.
If you have an egg handy; scramble it for her. Do it in a pan with a little bit of oil and make sure it's cool before you give it to her. Then when it's cool, mash it up fine, mix it with some water or watered down apple or grape juice and try to get her to swallow some of this. It's important to give her some nutritional support now.
She may have picked up something in the run and it's stuck in her throat, which may be causing the swallowing difficulties. Perhaps she just needs some encouragement and slippery stuff. That's why I suggested cooking the egg in oil.
If your chicken pens are within an extension cord distance, I recommend a heated dog watering bowl. They seem to work the best for me, or you can go to the feeding and watering thread and look up cookie tin heater. The thing to remember about the dog bowl is that the water evaporates quickly and needs refilling frequently. A chicken should never be without access to drinking water. They won't eat snow.
Go to your local library and request and check out any and all books on chickens that you can. This gives you a lot of information about them from many different perspectives. Even the smallest American towns have libraries and these libraries can get you books from other libraries so you have lots of things to choose from.
Good luck,
Mary
