Hi, I was wondering if anyone could help me out. I had unprotected sex, last month (December 21). I took Next Choice (I would love to have children, just not quite ready for them now) about six hours later. As of today, my period is nine days late. Does anyone know if a late period is a common side effect of Next Choice or is it possible I'm pregnant? I've been feeling nauseous and have been showing signs of fatigue but I didn't want to overthink the symptoms, but now with my period being late I'm starting to worry a little.