Take the metformin. It's the only thing that normalized my menstrual cycle enough to get pregnant. I'm taking it throughout my pregnancy as well and my baby is healthy and strong.
So many ppl get pregnant after starting metformin that it's just about listed as a side effect!
You've got the dbl whammy w/the hair trouble. Hypothyroidism AND PCOS both cause your hair to thin and break easily... hair grows in 3-6 month cycles so it can take a while to see changes. The metformin should certainly help!