Implanon

Harley

I've had the implant for over 2 years now. When I first got on it my periods were super wacky! I would have it for a whole month straight then be off for 3 months. After I hit the 2 year mark my periods got regular and stayed that way.... well I know that it is 99% effective at preventing pregnancy but I'm still scared... my period is 64 days late... is it normal for cycles to go from being normal to irregular?