I've been on the patch for about 5 months now, this last couple weeks I've been changing my patch to where I was pretty much a week late. My boyfriend of a year and a half have protected sexual intercourse but only protected by the patch. I'm not sure about my cycle as I never paid attention to it at all, but these past three days I have noticed something that has never happened. I'm due for my period in less than a week and once a day for the past three days there has been just a smudge a brown on my undies. I was wondering if its at all a possiblity that was IB, and I would be pregnant?