Postpartum period finally coming?!

Kristianna

So I have 3 kids. I had my third baby almost 9 months ago. I’m breastfeeding so I haven’t gotten my period yet. The last picture (pink discharge) I got 2 days ago... then yesterday & now today I’ve been getting this brown discharge. Could this be my postpartum period coming or maybe pregnancy? I have been having lots of unprotected sex but using pull out method which ik isn’t effective lol