Hello I have recently become pregnant. For the 3rd time. After two previous miscarriages. And trying for 3 years. I have pcos. The fertility dr at the miscarriage unit as prescribed me, metaformin. As apparently reduces miscarriages. They have started me on 500mg for 1 week. 2nd week 1000mg. 3rd week 1500mg. The dose seems quite extreme. I will take what ever I have to take to prevent miscarriage. As anyone else been on this dose? Or any advice? Think I'm just being paranoid?