4 weeks PP period???

Kennedy • Brooklynn Noelle 1•3•18 // Angel 3•27•19👼🏻 // 🌈Aniston due 1-10-20

My bleeding stopped around 3.5 weeks PP. it started trailing off and i could tell it was at that “end stage” of lochia (spelling?) . Well now “it” or my period has returned at 4 weeks PP it’s bright red, accompanied by some cramps.

However I’m exclusively pumping? With my first I didn’t get my period until I stopped pumping at 4-5 months? Is that even possible?