OK, I have been on the patch for a few months. I had a period for almost 3 weeks, then when i stopped I didnt put another patch on. I went a week with out it, and I did have sex in that week, then I put the patch back on the last 2 weeks. It is Wednesday and I was supposed to start this past saturday. Could I be pregnant? And are you not supposed to have sex for the week you dont wear the patch?