Strep does not always need antibiotics, as people have stated here, but it does sometimes need antibiotics. It isn't an all or nothing thing with strep, you have to assess case by case.
A few of years ago when my kids were very little I had a nasty case of strep. I was treating it naturally but it blew out of control very quickly (in a matter of hours) and if a friend hadn't stopped by and taken me to the hospital (dh was away and I was running in a foggy autopilot caring for the kids) I could have died. When I got to the ER I didn't understand all the fuss about a sore throat and feeling sick but my doctor was pretty shaken when we talked the next morning. The strep had invaded my blood stream and I became very, very ill. He does not like giving out antibiotics so when he says they are necessary, after this experience, I tend to believe him. I was in the hospital for a week. That said, I don't run to the doctor with every sore throat. I was very ill one other time with strep and I now recognize the warning signs in myself. I can tell whether can fight it on my own or if I need to get it checked out.
There is a time and a place for antibiotics. They are way overused by many doctors and patients but sometimes they are the treatment needed.
If your dd is given antibiotics in the future, I would recommend being present to make sure she takes them. Only taking a partial course can do more harm than good. The symptoms fade before the bacteria are wiped out and they can then become resistant to the antibioics - that is part of why we are finding so many resistant strains of bacteria, which is scary. Our family doctor sometimes writes a prescription but says to wait 24 hours before filling it. If things get worse, we filll it. If they are starting to improve on their own, we just rip the Rx up. Almost all of those get ripped up.