It sounds to me as if you have two main problems going on here - her dehydration and her refusal to take her antibiotics.

I think if it were only one of the other, you might be okay at home, but given that she sounds as if she is starting to get dehydrated (and with her high temperatures she will dehydrate more quickly) and it also sounds as if you don't have much chance of getting the antibiotics into her, I would strongly consider taking her to the hospital to be assessed. It may be in her best interests to be admitted, have an IV put in to both rehydrate her and to give her her antibiotics for a few days until she is better.

Good luck. Hope she gets better soon.