Can I Try Conceiving While Taking Primolut N, And When Will I Ovulate Next?

Hi i had my period start and stop type from 15 april to 28 april and it didnt stop until i took primolut n advised by my dr for 21 days. I want to know when will i ovulate if i am taking this med and can i try concieving this time. My last period was on 11 march.