Ovulating after nexplanon removal

Keona

Had my nexplanon removed Dec 11th 2018. Had a what I thought was a normal period that Friday Dec 14th (lasted 4 days). I’m trying to figure out when I ovulate. Any ideas ? The only thing is that I haven’t bled since, I wonder if my cycle is still trying to regulate. If my cycle was regular AF would be two weeks late. All tests have been negative.