Should I Continue Strone SR Or Consult My Doctor If My Period Hasn’t Started 15 Days After Completing The Medication?

Hi doctor, I m having PCOS (cysts are smaller in size), and doc advised to take strone SR 200mg for 10 days (twice in a day). I had continued the medications for 10 days ,yet i didn t get my periods. Today it s 15th day after intake of strone tab. Shall i continue the medications ? Or shall i consult my doc in person? Or is it pregnancy ?