Does taking Letrozole & Metformin helped anyone get pregnant, with PCOS?

Feedback will be helpful!

I been taking metformin here and there; but Letrozole every time I got my period from day 3-7 for the past one year. Had an miscarriage around April; and haven’t gotten pregnant since.

Anyone who have gotten pregnant with PCOS using those medications? Also I get my period every month except sometimes the date are off with my periods and/or long 5-10 days.

We have one child but trying for another. Any advice / feedback will be helpful.

Thank you 🙏🏽