hi, i've tried clomid in the past, worked on one occasion (on third cycle) now have almost 11yo, i have tried since up to five cycles a few times with nothing. I have PCOS as well, i've been on metformin (diaformin) for over twelve months now and lost about 20kg. When starting on metformin one side effect is diarohhea or cramping, my gyno didn't tell me about this but dietician did. If you start slowly and build up the dosage you should be ok. i started with half a table once a day for a week or so, then added another half every few weeks until i reached two a day. my gyno has just added another table per day (so now on 3). Gyno is now putting me on tamoxifen but i don't know anything about that one.