My bf and i had unprotected sex on CD 11 for about 2 mins if so long, then we stopped and he put on a condom and pulled out before he came in the condom away from me, we were a bit nervous so I took NorLevo 22hrs after, what are my chances of getting pregnant? It's been a week, we have abstained and I am currently experiencing light dark bleeding and mild cramping, is this a side effect or pregnant symptom?