I got my AF back when DS was 10 months (still BF) but it was very wonky - I would ovulate around cd25-27, then get AF 5-7 days later - not enough of a luteal phase for implantation.

As we were TTC, I started taking Vitex (chaste tree berry). It is supposed to help balance hormones, especially the prolactin (BF hormone) and progesterone levels. The first month taking it I ovulated on cd17 and had a LP of 10 days, the next month I ovulated on cd17 again and got a BFP so obviously the LP was long enough for implantation.

From what I have read, it can help bring back AF as well. It is safe to take while breastfeeding, however it can cause a decrease in supply. This did happen to me but DS just started feeding more often to rebuild the supply and then it was fine.

Hope AF returns soon for you.