For the past 3 months I have put my Nuvaring in a day late. I use to put it in on Sunday. The next month I put it in on Monday. Then Tuesday and now Wednesday. Well I usually have my period 3 days after taking out the nuvaring. Its currently Monday 1/30/2017 and it's been 5 days since I last took it out, still no period. But on Friday 1/27/2017 I took plan B. Could this be the reason? Should I be worried? Should I take a pregnancy test? If so, when?