Right, have namechanged as was outed, so if you know who I am, please don't shout it out! 
Am on 4th cycle 150mg. 1st cycle I didn't ovulate at all. 2nd 100mg cycle I definitely ovulated - saw the collapse on the scan and had the progesterone to confirm. 3rd 100mg cycle the gynae couldn't see any follicles growing, just all the usual polycystic twaddle, so she told me to just repeat the clomid again a week later, but at 150mg.
I was also on metformin 1700mg, but then the gynae told me now that I was the right weight range I could come off the met. However I've heard horror stories about insulin resistance and miscarriage.
Anyone else had this sequence of events or similar happen to them? And did it work? Am getting to the end of my tether with this!