The metformin is what helped me get pregnant with my last child. Often times reducing insulin resistance with LC and or Metformin will help to get your cycles in order.
If you do decide to go with the metformin, some people have stomach issues when they first start. Start with a low dose and gradually increase. Some people report that eating 1/2 of their meal, takin the metformin, then finishing the meal helped with the stomach issues as well. I was fortunate in that it didn't bother my stomach at all.
Good luck!