Took pill 13 hours late in first week of a new pack. Is Plan B needed?

Basically me and my boyfriend slammed a lot yesterday... I work late once a week. I usually take my pill at 10PM when I go to bed. But I forgot my pill pack and when I got home I just passed out. I just woke up and remembered to take it at 11AM, thankfully. It was the fourth day of a new pack that I took 13 hours late. Do I need to run out and get a Plan B? I’ve never taken it before so I’m worried, but if it’s needed I will...