metformin question!! ✨

I started metformin two weeks ago. I'm also taking progesterone on CDs 18-30. I'm on cycle day 35 and no BFP and no AF yet. Would metformin delay my period? Once I start my cycle I will be taking letrozole and estradiol as well. I had an ultrasound last month that showed several polycysts so I know the BFP isn't coming. I just want my cycle to come so we can get this months cycle started!