Where should I start?

I had my 1st mc in 2013 second & third mc in March & July of this year. I have PCOS and have been taking metformin 1000mg 2x a day with having sex every other day per my OB(it worked!) So I decided to take a break this month & start back taking my metformin October 1. Has anyone had multiple miscarriages & finally had a baby? I think if I get pregnant again I want feel it until I'm like 4 months........