I have been using nuvaring for over a year with the 3 weeks in, 1 week out method. I have never been late and i wasnt this last week either. I took my ring out on Feb 1 and got my period on wednesday Feb 4. I put a new ring in on Feb 8 and then yesterday, less than 24 hours later, I had sex and the condom broke unfortunately. I know when you first ever start using the ring the first week you must use protection but I have been on the ring for over a year so that is why I am unsure if I am protected immediately or have to wait a week.