Wait for period or take progesterone ?

So I’ve been off the pill for over 1yr. I have annovulation so the Dr told me to wait for my period & take Clomid. I never know when my period will start. So he recommended to take progesterone if I don’t start my period. So my question is should I wait for my period or should I just take it? Which option would help increase my chances? Any suggestions and why will help. Thanks everyone ☺️