I am new to birth control and barley started taking them on the 22 of march and my boyfriend and I had sex on the 29th and used a condom but had a condom mishap. I've been taking the birth control everday at 8:30 pm for the pass week. i don't know how long it takes the birth control to start working. So should I take plan B to be on the safe side? Or am I just worring for no reason?