Hi Jennifer! I've got the same problem - I've had 4 +strep tests since January. I'm getting pretty frustrated. After each course of antibiotics I test neg., but the infection reoccurs anywhere from a few days to 2 weeks after ending the antibiotics. For the first 2 rounds I took penicillin, then cefzil and now augmentin. If I find something that works, I'll let you know. Please do the same.