I started taking heather birth control pills in Aug or Sept of last year. Took for two months had to take me off of Heather birth control because of cramps. They put me on Camila. I took two packs of Camila on time every morning. And my periods seem to have been normal. Until Dec 17 I bleed from Dec 17 till Jan 5. And now I'm on my third pack and was supposed to have started on Jan 10. It is Jan 18 and I still haven't started. Could it be because I bleed so long? Could I be pregnant or could it just be the pills?