Hi. I'm Mariella, 21years Of Age. Have PCOS. My OB

Hi. I'm Mariella, 21years of age. Have PCOS. My OB gyne suggested to take folic acid, duphaston and bactiv. When I asked my doctor if I'm pregnant, she is not still sure about it. In my result I have to serum b-Hcg for pregnancy related. But the doctor didnt advised the same thing. How will I know if I'm pregnant? I took pregnancy test but it was negative. Haven't got my period for more than a month now. Thanks