TMI discharge question.

Hello there! Little back story... I have PCOS, up until this summer had a Mirena. Since its removal have only had two cycles. During those cycles I seem to have CM along with period flow. I remember this happening before (a couple years ago before the mirena). I realize this is a stupid question (I am a nurse! Haha) it possible to ovulate while on your period? Has anyone else experienced this?