Glad to hear that she is doing better. Did you ever give her an injection of the Noromycin though? Getting antibiotics is very hard nowadays because they (FDA) have removed most from feed stores. Tylosin would be one that I would order from here in case of future problems...
It is strange the vet prescribed something they did not have in stock to give you. Do you have the Noromycin? It is a long acting oxytetracycline that is injected into cattle once or every 3 days. I am not sure that it is effective given orally. But I would give it by injection into the breast...