metformin

So I'm supposed to be taking metformin after I'm done with my provera pills. I have pcos and trying to get pregnant and my doctor said I should use this approach after numerous amount of blood work being done. Just wanted to know any succes for any of you that took metformin? What where the side effects at first? How long did it take you to get pregnant ? I would love to hear everyone's experience on it ! #SoulCysters