Period while breastfeeding

Mollie

I just had my 3rd child on August 10th. With my previous two kids I did not get a period until they were around a year old when I stopped pumping / breastfeeding. He is 7 weeks and I just got my period. Why?!?!? Is this normal?! Will it affect my supply? I’m still exclusively breastfeeding and we had a lot of latching issues at the start and still are working on them. Could that be why?

Feeling frustrated.