Should I take a plan B?

Hi everyone. So I’m on the pill (Norgestimate & Ethinyl Estradiol), I always take it at the same time (9am), but today I completely forgot, and I took it only at 9pm, and I had sex after I took a pill. Did the pill still work? It never happened to me before. So idk. Should I take a plan B, or I’m fine?