Anyone get pregnant while on yaz and metformin?

I've been trying to get pregnant for a few years now have had injections, many many clomids and for some reason never got pregnant. I'm 24 and now my dr raised my metformine to 850 mg I take it twice a day and now I am on yaz for two months to see if it helps my periods since its been a yr since I've gotten one. I have had pcos for years now. My question is has anyone taking metformine or yaz actually gotten pregnant? I know yaz is a birth control but I have heard and read some woman actaully getting pregnant on it since it does the total oppsite for pcos women. And how long did you get pregnant after taking the metformine? Thanks.