Any ideas on this bleeding?

H • •🌈💙12/18, 💙11/19, 🌈💗11/21, 💙5/23•💍03/13•

I breastfeed but my little gets a bottle once every week an a half- 2 weeks. I’m 9 weeks pp Wednesday. Started spotting New Year’s eve around midnight, (first picture) which turned into the second picture. It’s not heavy, just occasionally ends up on a panty liner. Other than that only when I wipe. Super nauseous so I tested and it was negative, is this my period ? Thanks :) edit: been bleeding for 3 days now