failed IUI--Metformin

Hello,

Anyone out there, I have had cervical cancer. Now we would like to have a baby.
I am 44 & will be 45 next month. I have tried clomid & 2 IUI's both failed!
We conceived on our own, only to lose the baby in a car wreck. Very flustrating!
My husband is not sold on the idea of donor egg, but that may be our only avenue.
I have PCOS. I don't ovulate without some type of "help". skip periods for as long as 3-4 months. I want to try Metformin . has it worked for anyone? feedback welcomed!