What's the latest your period was after plan b?

Rachel • Happy, mother, confident, intelligent, kinky, spiritual, Gemini, animal-lover, book worm, gardener, single af
I'm only a day late and took the generic plan b the day of (morning sex and we were worried he came inside so I took it that night). I'm wondering what's the latest you have been getting your period after the pill? I'm extremely regular, not worried too much but still.