4.5 weeks postpartum and period?

So the last few days I’ve been feeling off. More tired then usual, more hormonal, started breaking out and was feeling nauseous. Then today I started having some red bleeding again. For the last week it’s been brown discharge that I can barely see only when wiping. I’m wondering if this is my period returning because I feel like it’s my period and I guess it’s not unrealistic to get it now. I pump but not that often ( maybe 3 or 4 times a day) and I breast feed even less. Wondering if anyone else is in a similar boat.