I've been using the Nuvaring for about 4 years now. I've never been late with my period before. I took it out on Sunday (after 3 weeks) and it is now Friday with no signs of getting my period. I did have sex on Monday morning, which was 1 day after I took it out, but I should have been protected. I have 2 questions: Could I be pregnant? and If I don't get a period at all this week, should I still get the next Nuvaring from the pharmacy and insert it on Sunday?