I began using Nuvaring on October 3 and took it out Oct 23 because it kept slipping out. I had unprotected sex on October 25, and got my period the next day. My period was normal and lasted 4-5 days. I put in a new NuvaRing on October 30th, then took it out and began using BC pills on November 1st. I'm wondering what my chances are of being pregnant, and when a pregnancy test would be able to detect it?