Pooky I am in the same boat you are in. I two am having trouble getting prego the 2nd time. Did you have any problems the first time? I didn't we weren't even trying yet so this came as a real shock for my husband and I. I have been on Glucophlage for 4 months now and I have lost around 25 lbs. I have felt better and it has made my cycles. I am now usually 30 some days unstead of 45-50 which was my normal. I started charting my waking temps about 2 months ago and my dr determined that even with the Glucophage I was not ovulating. So he started me on Clomid. this is my first month on Clomid and from my temps I can pretty well tell you that it hasn't worked this month.
But I am keeping my hopes up for next month. I would love to keep in touch with you and see how you are progressing and hopefully we can share information so that we can help each other.