I've had the nexplanon implant since November 2015 and I read that a side effect can be irregular periods.  My first four months of having the implant were hectic with periods, I had them every two weeks.  But as of now, I haven't had a single period or even any spotting at all since March 2016!  Is this normal for implant users?  It's been over a year and I'm starting to worry.