I know how you feel. I was so busting to have a bleed, and when it did come.. I cursed my OB, coz I'd forgotten how horrible and painful it all was! LOL.

Definitely start temping and charting. It makes you feel like you're doing something too.

How much Metformin are you on? I'm on 2x500mg a day. Is it for treating PCOS? If it is, the specialist may later put you on Clomid to stimulate ovulation. That was the plan for me, after 6 weeks on Met I was to start Clomid, but coz I bled we decided to see if Metformin was enuf. and it was!