Nexplanon

I just wanted to know if any of you lady's have nexplanon and went in recently to get it replaced! I've been on mine for 3 years as of November of 2016. When I went to get it replaced they said it now covers for 4 years! Woohoo! But now it's January 2017 and my period is 10 days late 😔 pretty nervous here. My periods haven't been normal since I was put on nexplanon but they have never been this late! Just wondering if any of you lady's have been told the same thing! Thanks