Q: When would I need to take Plan B? A: Plan B One-Step is there for you after an instance of unprotected sex or if your regular birth control method falls through, like if the condom breaks or you forget a birth control pill – so we’ve got your back! And, taking Plan B One-Step emergency contraception won’t impact the effectiveness of your regular birth control. You can and should continue your regular birth control right away after taking Plan B – or talk to your health provider to find a regular method that works for you if you don’t have one. #IveGotThis #EmergencyContraception Use as Directed.