I'm 20 years old and I have been taking Ortho Tri-Cylen Lo for more than 6 months. I have never missed a pill, but recently I haven't been taking them at the SAME time. I'm supposed to take them at 9pm and sometimes it's around midnight before I take them. I had unprotected sex a week ago and since then I have been spotting heavily. I have never spotted until now. What's going on?? Is this normal??