I am 17, currently on Ortho-TriCyclen Lo and am sexually active. I normally take my pill at 9pm, but sometimes I take it from a few minutes to a few hours later. Once or twice I have forgotten a pill and taken it as soon as I remembered (according to the instructions, that's what to do). My period has been regular for the past few years, to an extent, and I have it every 28 days. However, this month my period has been on and off for a literal month. It comes for a few days, then goes away for one or two and then all of a sudden, it's back again in full force!! The blood is darker now and thick and clotted so I'm kind of assuming that it's from build up. I don't know why it would build up though, unless I was pregnant and didn't know it. Is it possible that I got pregnant and has an early miscarriage or something like that?? I have been stressed out a lot lately too, but it's almost going on 5 weeks of stopping and starting at the MOST inconvenient times and places! (Think Church, School, Boyfriend's house, etc.) I'm used to having a heavy flow, but this is too much! I've been having headaches on and off too, along with nausea once in a while. I have an appointment scheduled with my Gynecologist for Dec. 9th, which was the earliest they could see me, for an exam and a refill on my BC. Can someone please help me in the meantime???