I've been on the patch for over a year now, and last Monday by boyfriend and I were drunk and had sex, I had the patch on at the time, and it was a brand new patch. For previous weeks, I had kept putting new patches on for more than three consecutive weeks to prolong getting my period, and this past Monday I took my patch off to start my period but it hasn't come yet and I'm worried about pregnancy. Is it possible that since I kept putting new patches on longer than I was supposed to, I got pregnant?