I have had Nexplanon since November of 2013. I had a very light period for a day or two every month after I got it. Then I got my normal period back about eight months later. Heavy and 7 days long. I started having sex in November and had my normal period that month, but now it's January and I haven't had one since. I haven't had any signs of pregnancy but I'm a little concerned because the Nexplanon has never caused me to not have a period, just very lite and short ones. Could having sex again after a long period of not having sex caused my cycle to stop? Is it possible that the Nexplanon has stopped working? It is still in the same spot as when it was first inserted.