Dear friend, When you are taking birth control pills regularly for six months, you do not have to worry about the pregnancy. These pills have got more than 98% success rate. During these pills, there is no ovulation. So you need not count the day of ovulation. Also, if for six months you are on the pills regularly, there is no necessity of taking morning after pill since you are already protected from the pregnancy by your regular birth control pills. I hope your dilemma about the pills is resolved now.