All you can do is hold her and love her like Fluffnstuff said... I am sorry. She does sound like she's pretty far gone. She is probably exhausted - fighting for your life is hard! Keep her warm, give her little drips of water on her beak from your fingertip - don't force it. You can get the...
I'm no expert, but I've been told that all natural plain yogurt (NO sugar/fruit etc) when mixed with the chick feed to make a mash, is good for helping them digest what's in their crop. Please someone tell me if I'm wrong, but my girls love my plain yogurt, and no crop troubles so far!