Never ending period.....

Nidia • Mother of 4 amazing children twins 17, 15, 9 the love of my life and I seeking the journey to conceive again ❤️
I started my period Nov 18, removed my IUD on Nov 20, why am I still on my period I'm flowing medium should I be concerned? Did my period move and change dates on me? Could I be having my December period already? Thanks ladies....