I got my Paragard inserted Nov 30, 2017 and have had seemingly regular periods since then, until now. my last period was Dec 25, 2017 - Jan 3, 2018. I am almost 2 weeks late according to <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">Eve</a> and Glow's cycle predictions. I've taken several pregnancy tests and they've all been negative, but my period has never been this late before. Is this normal? Has this happened to anyone else? I called my ob/gyn and they said if I still hadn't gotten it in two weeks, to test again. I'm worried that something is wrong.