Will Taking Primolute Be Safe In Controlling The Menstrual Cycle?

I am 26 year old, have 2 year old baby with c section. I am having hormonal imbalance in body due to which my periods prolong more than 7 days , now its 15th day , periods yet not stopped, I consulted doctor, she gave me Primolute N to take for 25 days. previously I was taking contraceptive pills n after stopping those pills I got this problem. I also want to get pregnant . what should I do? will Primolute N will help in making my periods regular? can I get pregnant fast?