LO 8.5 months, I still don't have my period back

My daughter is 8.5 months, and I still breastfeed her in the mornings and pump a couple times a day. Other than that, we supplement with formula, and she eats fruit/veggie purees.

I still don't have my period back. Is it because I still breastfeed? Or could it be my PCOS..? Both?

Just curious about other moms' experiences.

I have seen polls in this group that many of the mamas have gotten theirs back. I've read posts about some being pregnant again. Not sure what the deal is.