First of all and this is important. This can be dangerous, especially if strep. It can take just a few hours for strep to become septic and not long after that, it can be terminal. The longer you wait, the more dangerous that it may be.
Suppose that it is turning septic? Then suppose that it is Antibiotic resistant? What chance will you have if you wait too long?
If Antibiotics fail, then turn to Rife or a very good multi-frequency, multi-mode zapper ( yes, I am involved with the manufacture and sale of these. )
Why this and not Colloidal Silver ? Colloidal Silver can take days or longer to build up to the needed levels but the right LVPEF device might have effect in just a couple of hours.