Okay, let’s talk about this. I remember a time, maybe a couple of years back, when this exact question was front and center in my life. Not me personally, but my partner at the time.

That Whole Situation
So, things happened. You know how it goes, a ‘whoops’ moment. We realized pretty quickly that we needed to sort it out. We went straight to the pharmacy the next morning and got Plan B. She took it right away, following the instructions perfectly. We thought, okay, done the responsible thing, now we just wait and hope everything goes back to normal schedule.
The first few days after she took it were okay. She felt a bit off, maybe some nausea, but nothing too crazy. We sort of put it to the back of our minds. But then, the date her period was supposed to arrive came and went. Nothing.
The Waiting Game Kicked In
One week late. Okay, a bit stressful, but we read the leaflet, talked about it. We knew Plan B could mess with cycles. It’s a big dose of hormones, after all. We tried to stay calm. But man, it’s easier said than done.
Then it hit ten days late. Now, real worry started creeping in. Every morning felt tense. We were constantly checking the calendar, doing mental math. Was it working? Did it fail? Your mind goes to all sorts of places.
It felt like we were holding our breath. We talked about taking a pregnancy test, but decided to wait just a little longer, maybe until the two-week mark, because we’d heard it could delay things significantly.

And wouldn’t you know it? Around day 13 or day 14 past her expected date, so yeah, pretty much bang on two weeks late, her period finally arrived. The relief was huge, seriously massive. It wasn’t a normal period, definitely heavier and a bit more uncomfortable than usual for her, but it was there.
So, based on that one experience I was closely involved with? Yeah, Plan B absolutely seemed to delay her period for about two weeks. It was a stressful two weeks, not gonna lie. It really throws your body and your mind for a loop. It’s not something to rely on, obviously, but in that instance, the delay was very real and lasted pretty much exactly that long.