My first baby is now 6 months old, and for the first 4 months I was breastfeeding exclusively. When I returned to work, my milk production went down, and we had to supplement. So, for the last 2 months I've been nursing the baby when I'm at home (morning, evening and through night) and I pump once a day at work.
I did have one very short period when I returned to work, but I haven't had a period since (so it's been two months).
Is an irregular period "normal" when bf'ing?