Kind of nervous, my doctor did the strep b test on my last appointment and I haven't heard anything…

Kind of nervous, my doctor did the strep b test on my last appointment and I haven't heard anything back from it. I have an appointment tomorrow, hopefully they tell me something although it's with another doctor. My fear is that I will test positive and the only antibiotics that the doctors feel safe with using is penicillin.. Which wouldn't be bad, but I am allergic to penicillin and now I don't know what they're going to use. I don't want my baby born already with an infection she got from me..