I am sorry to hear about your poorly girl, i would weigh her daily/twice daily and record her weights, if she is not eating anything atall by herself, it would be recommended to syringe feed her 120mls of critical care or mashed up pellets aswell as some water containing pro-biotics (to help her gut) every 24 hours, every 2 - 4 hours. While any illness is serious, hopefully with your syringe feeding and the AB's she will be feelng better and back to her normal self soon.
It could be that its the AB's that's putting her off her food, or she could be really feeling poorly and not wanting to eat, you could mix porridge oats with the CC or mash to help a fill her up and with her weight.
I am not sure how experienced you are with syringe feeding and i dont mean this the way its probably going to sound, but if she is not eating for herself syringe feeding could be a matter of life or death, so its important that no matter how resistant she is that you get it into her, its heartbreaking but sometimes you do have to be cruel to be kind.