My boyfriend and I got a little carried away and ended up having intercourse during my "menstral cycle" on a 3 week birth control plan. This means I only take birth control 3 weeks out of the month and then take no pills the last week of the month which allows my period. Do I ovulate during this week? Or do I not ovulate at all with this brand? I'm unsure and a little worried because it is the fourth day of my period and with this brand of birth control, you don't take any pills during the week of your period.He did in fact pull out before ejaculation, however I would still like to know the odds of becoming pregnant.