I'm 6.5 weeks PP and was given the go ahead for sex by my OB. He said my stitches had dissolved and…

I'm 6.5 weeks PP and was given the go ahead for sex by my OB. He said my stitches had dissolved and we made sure to go VERY slow with plenty of foreplay and lube. Well I started bleeding after and I'm still bleeding today. It's not excessive but it's like one of my periods, which tend to be on the heavier side, and I started cramping earlier. Is this my period or is this more postpartum bleeding? Should I be concerned? Has anyone else experienced this?