I've been taking Tri-Sprintec for about four months now, my boyfriend and I do not use condoms because They cause me a lot of irritation. He and I had sex on Friday night and I realized Saturday morning that I have not taken my Friday pill. So I doubled up and I also took Plan B for my peace of mind. My question is, do I need to use back up protection for the next few days/week? Or is it like I never missed because I doubled up the next day?