Prenatal vitamins!!?

Hope Faith • I`m 29 and happily married.. 4 MCs. Rainbow baby born Nov 2016. Rainbow Baby #2 due Oct 2018. Mommy of girls! PCOS warrior.
I want to start taking prenatal vitamins since we are trying to get pregnant but I'm extremely high in iron. EXTREMELY! Always have been. I always get asked to donate because of it among other things. So my question is which one is the best prenatal vitamin without iron? Or should I take it without iron until I get pregnant? Anyone have this also?