I'm 26. I've been on Yaz bc pills for about six months, and I've been having periods for 15 years, and I've never had any kind of spotting whatsoever, until last week. My period went from Oct. 28 - Nov. 2, which is a day longer than usual. My boyfriend and I had unprotected sex the nights of Nov. 1 and Nov. 2 (Sat./Sun.). I always take my pill on time, except that I missed it the night of Mon., Nov. 3. I accidentally fell asleep and slept through until the next day, forgetting to take my pill until after work Tues. Nov. 4, and then resuming my normal regimen. Meanwhile, I began spotting for the first time ever, from that Mon. Nov. 3, for about 5 days total. Like I said, I've never spotted before. I know that hormonal fluctuations can cause this, but could delaying one pill by 18 hours the day after my period cause it? I know spotting can also be implantation bleeding, but this spotting was directly after my period, for five days; so it seems too long and too soon after menstruation to be implantation. The spotting was a very small amount and brown, sometimes pinkish, with occasional tiny brown flecks in it. At work, I've been urinating about once an hour, and the spotting was there every time, eventually needing a tampon for the last day of it. I've also been extremely exhausted, but I ended up with a cold/flu that may be the cause of that part. I just wonder if it's at all possible that I'm pregnant, or just some other fun female body anomaly. ??