I have two kids already. I was on the Nexplanon implant, and had it removed in early September. I had a normal 5 day period, regular flow. The same day I ovulated, two weeks ago, I had unprotected sex with my husband. A week after having sex, I had extremely light spotting that lasted a few hours. Now my period was due yesterday and no sign of it. I've had discharge, no period at all. Could I be pregnant? Could the spotting have been implantation? I took a test a few days ago that came back negative. I have not taken another.