... supposed to start my period, I had some cramping (normal for my PMS) and some spotting. I took this to mean it was my period starting slowly, as it usually does. I put in a nuvaring that day, but then my period never came fully. I had 2 more episodes of light staining, and some cramping here and there, but no period. Nuvaring has been in for 6 days now. What does all this mean? I put it in on the day my period was meant to start (so the right point in my 28 day cycle-unless plan B messed with my cycle?) so confused. Will I be protected against pregnancy this month?