Brown spotting 10 weeks postpartum?

Raven

Had brown spotting three times in past week only when I wipe and the littlest bit on my panties. I didn’t think to take a picture of it any of the times unfortunately. I have had unprotected sex multiple times since I was cleared for intercourse at 6 weeks by ob. I already know it was not the smartest idea so please keep those comments to yourselves. Was just wondering if this was normal? Haven’t had my period return yet. I pump and supplement with formula so haven’t breastfed my daughter since 2 weeks after she was born due to some medical issues. Any advice appreciated, but negativity please keep to yourself. Thank you in advance xo❤️