Ok Kim I have one word to help you through this....

MAGOO!!

I know exactly how you feel. It hurts your feelings as well as your body! You need to get her in a cage or keep her in the kennel. Cover it and leave her be until tomorrow. Then be prepared to spend lots of time talking or reading to her so she can get used to your voice and all the surrounding sounds and smells. Don't make eye contact with her and don't try to touch her again for at least a few days. Talk, talk, talk! A cage would be better so you can change the litter box and give her food and water without having to get to close to her. She needs to have time to feel secure. Time, time and more time is what it is going to take. Remember you have no idea what has happened to her in the past or what will really frighten her. Give her time to learn about you while you learn about her.
I would also make sure to wear heavy gloves and long sleeves before putting my hand into her cage. Are you sure she isn't in labor? Maybe she is pain and terrified.