Hi. I've Recently Become Sexually Active With My Boyfriend. We

Hi. I've recently become sexually active with my boyfriend. We both are STD free, and I'm on an oral birth control pill (trisprintec). Therefore, we no longer use condoms. My boyfriend always uses the pull out method and I always take my birth control every day. Although I do take my birth control every day, sometimes it's a couple hours different from the precious day. (Some mornings 8am, some 9am, some 10am). I am just wondering if these two birth control methods combined are a good method to use ?