Exclusively breastfeeding and fertility

Has anyone actually gotten their period back while exclusively breastfeeding? My son is about to turn six months and I am exclusively breastfeeding and it has not returned. I do not want to get pregnant yet but I would like to start trying once he is one years old as it took a little while to get pregnant with him. I don’t want to stop breast-feeding but I’m just wondering what my chances are of it actually coming back while I am exclusively breastfeeding. I have A LOT frozen so I’m wondering if i should start weaning somehow in a few months. Any advice / feedback would be appreciated!!! Thank you