Yes, unfortunately, mail order medications take awhile to get there. It is good to have it on hand for any future outbreaks. Vets can prescribe antibiotics if you see them. I would not give the Tylosin antibiotic to any chicken unless they have the same symptoms. You can separate the chicken and...
I would treat her for possible mycoplasma (MG,) since that can cause the eye bubbles, swollen face and swollen ear. Tylosin powder for the water is fairly easy to get online, and some use Denagard or a few others. Amoxicillin does not treat MG. Here is where to find it...