Postpartum bleeding on 6th week

I'm almost at the end of the 6th week after giving birth and still seeing bleeding. It is bright red blood that will soak a medium day-use sanitary pad, not brown blood trace. In my previous delivery when I finished bleeding on 3rd week. So the current situation quite surprised me. Is this normal? Anyone encounter similar situation as me? I'm breastfeeding heavily and had taken quite a lot of herbal soup in my confinement month as well as postpartum massage. Not sure whether these affects.