I had sex 4-5 days ago. Well, today I had very very light bleeding now i'm cramping but no blood. I still have a week and a half till time for my period. I'm on bc and take it on time everytime! One time a month ago when I had food poisioning I skipped a pill and then had breakthrough bleeding with in 2 hours. It was a lot heavier than this was today and lasted a lot longer. I havn't skipped a pill or taken it late this time though so i'm a little confused. Is there a posibbility of pregnancy? Or is this normal even if I am taking exactly as I am supposed to. Worried because he didn't pull out, but still I take my bc religiously!! The bc I take is micronor......