sounds very good! If she's still laying and is still active, I think you have nothing to worry about except keeping an eye on infections.
Your doing a great job, so keep us posted!
also, there is no guarantee she will pull through, but chickens are tougher than people think. However just be prepared if the site starts smelling bad or pussing up, she's got a major infection and you're going to be kinder to go ahead and put her down...but if you go at it early and be...
Yes I'd suggest no consuming eggs while she's on antibiotics. Some people will eat them, but I personally think its better to not use them. I give them to my dogs in their dog food when mine are on simple penicillin...it isn't going to bother them, tastes good, and theres no waste or throw in...
ideally a picture would be great...seeing an injury will give you a more steady response and solid idea on how to care for a wound...especially if your not sure what your looking at.
First and foremost though, flush it out with warm water...add some vinegar (1 teaspoon to 16 ounces) and wash...