How soon after birth can you have a period while breastfeeding?

I am 5 weeks postpartum. I had a c-section and due to some initial latch issues with my baby I have been mostly pumping with some breastfeeding, however I haven’t been doing night feeds (my partner has been giving pumped bottles at night so I can get more sleep.)

My bleeding stopped around 3 weeks and a few days ago came back, light bleeding accompanied with light cramping. I’m wondering if this is still just postpartum bleeding or if it’s possible I’m already having a period.