emergency contraception
"Hi! I know that if you are reading this probably you are scared ! That's normal I did it too! But don't worry girls, I had sex with my bf a month ago and the condom slipped and he came inside of me...I was taking birth control pills at the moment but I was still don't sure about it. So, I was super stressed out and crying. He bought the Plan B pill. I didn't have any symptom and my period came even days before expected. Just don't worry and relax! Try to take the pill the sooner you can and you're fine ;) 
Believe me, I know how stressed you can feel right now!"