Plan B works by delaying your ovulation. If you're already ovulating, then it can't do that. You'd need one of the other methods of emergency contraception, either the pill Ulipristal Acetate, or an IUD fitted by a doctor. Either of those things can be effective if done within 120hrs/5 days.
Most women ovulate around the middle of their menstrual cycle, so days 10-18 is a good guide of when Plan B may not work for you.
The 1st day of your cycle is the 1st day of your period.
Search for questions
Still looking for answers? Try searching for what you seek or ask your own question.
Plan B One-Step - how would it work if I took plan b one step within an hour of the condom breaking?
Posted 3 Oct 2013 • 2 answers
Plan B One-Step - Will plan bstep one Not Work After 3-4 days of incident. we are both rlly scarred?
Posted 18 Jul 2014 • 2 answers
Posted 10 Mar 2015 • 2 answers
Posted 9 Jul 2015 • 1 answer
Posted 11 Jun 2016 • 0 answers