This could just be due to an upper respiratory disease. They usually do have a fever early in the infection and will feel bad. They also tend to avoid eating and drinking, because the congestion in the nose does not allow them to breathe properly. It's also possible that Baby Girl has ulcerations in her mouth causing the drooling.
You can help the congestion by giving her a steam bath. There is a link below that has good information about how to do this and other helpful tips for this condition.
http://www.wikihow.com/Help-Your-Cat-Breathe-EasierIt's best if you can get Baby Girl to a vet within the next day or two. This infection seems to be complicated and things can get much worse without treatment. The vet would be able to prescribe the necessary treatment to make her feel better and keep the infection from getting worse.
I hope this helps and she feels better soon.