Strep or viral infection, while pregnant?

Patient: I have been sick for almost five days. I went to the doctor and they looked at my throat and thought it looked like strep. I am pregnant and so they perscibed me penicillin. Since being perscribed medication my sore throat as turned into major cold symptom, sneezing, coughing and sinus pain. I did not get a throat culture and am I concerned I am taking medication for a viral infection, what shoul I do? continue to take it go back for a culture, stop taking it?

Doctor: