Progesterone

I used to struggle with very irregular periods due to PCOS up until about a little over a year ago when my pcp prescribed me progesterone. The progesterone regulated my cycles and I now get a regular period. With the being said I have been taking the progesterone starting CD 14 for 10-14 days and am now reading that this could be what affected my ovulation in the past. I recently have seen a different dr for fertility who prescribed me a trial run of metformin and i actually ovulated this week! Now im just not sure how or if i should continue with my progesterone. Any advice is appreciated!