I have been on Nuva Ring for 5 months and I follow the 3 weeks in and one week out schedule. I was one day late (on my week out) re-inserting my new ring. So I wore my ring for 3 weeks then took it out, had sex on day 7 of it being out, and then re-inserted a new ring on day 8 of it being out. Could I be pregnant? And how am I free of the risk durring the 7 days when it is out ever three weeks?