Okay, I'm 18 and have been taking contraceptive pills since 14. I recently came onto a combined pill (used to be on mini pill). I've been on cilest now for 6 months, and during my last pill free week i bled as normal. However, i started my pack a day late, and went away, forgetting my pills. I missed days 6, 7 and 8 but took pill 9 as normal. The next day (Monday), i started having a really heavy period, it's now thursday evening and it's easing off and getting lighter. Is this just breakthrough bleeding or could i be pregnant, as I had sex on the days of pills 8 and 9. I would have thought though, from having such a heavy period rather than spotting that theres nothing left in my womb!!!