Breastfeeding and periods

Kayla • Baby boy 2/15/18 and Baby girl 10/23/19❤️

I had what I think was my first postpartum period at 8 weeks.. it was very light, only needed a pantiliner. Well based off of my periods before I was pregnant I should have started yesterday. I am breastfeeding but since I’m back at work I do pump throughout the day and nurse at night. My question is: is it normal for your period to be sporadic when breastfeeding? I mean there’s a slim chance I could be pregnant I just haven’t went and bought tests but with an 11 week old my life would be crazy if I was lol