G.B.
Strep is a tricky one. It can be a virus and not respond to antibiotics at all. When my granddaughter had it she was in the hospital for a week on IV Rocefrin (sp). It's one of the strongest antibiotics out there and it's really good.
It didn't touch it. Because it was viral and not bacterial.
Her throat swelled nearly shut and she couldn't swallow. In the hospital they gave her a Mr. Thirsty suction tube and she sucked the pus and saliva out with it.
BTW, a Z-Pack does absolutely nothing for me. I get a prescription for it, take it all, then go back worse off and get something like K-Flex.
For the ear infections and probably sinus infection that will follow I suggest you ask the doc for a med that works for you, one that you've had good results with, to treat those areas. The strep will work it's way out on it's on good time.