So I'm 25 an my cycle is due 10/10/15 I get off work at midnight (12am) I had unprotected sex on 10/4/15 around 1-3am close to when i get off after i went to woke up on same day an before work I went to Walmart an got the Plan B Pill took it soon as I got to work am i safe or not cause I've had none of the side affects it say u can have it say for best results take it early as possible with in 72hrs (3dys)???