Fertility med question???pcos???

Alli

My doctor prescribed me medroxyprogesterone to help me have a period and then also prescribed me with letrozole to make me ovulate to help me try and conceive. so my question is if I am in my ovulation period now and start taking my pills when suppose to, to make me have a period for next month.... would that mess up anything if I just so happen to conceive this month or would the pill just not work and me not have a period at all?