scared about unprotected sex mishap

Nikki
So me and my SO have been having intermittently unprotected sex (sometimes with condom, sometimes pullout method) for the past four months. Five days ago, we had sex and when he pulled out, he thought he got some on the outside or right in the entrance of my vagina. I want to take emergency contraceptive but don't know what brand will work since it's already going to be coming up on 5 days. Wednesday we had sex. It's Saturday now. 
Also: I have been wanting to get the implant, so we don't have this issue. But I am under my parents insurance and don't want my visit(or implant) to show up on the insurance. Not sure what to do ladies???????