The shot - Unprotected Sex

Tatyana
People say don't 100% believe in your birth control it's only 99 so they say and don't let your man talk you in to going bare but I have had the shot 2 months now and having unprotected Sex is what we're looking into has anyone been through this and think it's right or wrong I have 2 friends that have pure luck and talk about their Sex life and how they have always been on the shot and there man cum inside them. I'm scared of that so all me and my boyfriend do is the pullout method and advice?