Is Duphaston The Right Medicine For Polycystic Ovary Syndrome?

hi. im diagnosed Pcos last November and im 3 weeks late no period, my doctor told me to take dupaston for 5 days, to regulate my period.. after that i had my period on December, January and February. now is march and mt period not yet come. i had intercourse on my safe days and im sure my boyfriend not cum in me,.. now im 3 days took dupbaston again, and maybe my blood will come. on my 3rd day using this tablet, we had intercourse , it this possible im become pregnant? im not yet ready for this. i still hoping for my blood to come. hope for your advise. thank you