I've been on triprevifem for about 7 months now. Two months ago my period came a week and a half before my placebo pills. Last month it came a week early. At the time my period first came early I was under a lot of stress and figured that was why. Now that my period has done it twice though I'm wondering if my birth control just isn't working. I take it everyday usually between 8-11 pm. I've only been late on two pills and it was only by about 8 hours. My placebo pills start is about 4 days, and there's no sign of my period so far. Have I been without protection this whole time?