What if you’ve been on birth control for a couple years, missed the prescription by 4 days after period ended .. had intercourse, the condom broke, took Plan B a few hours after and then started the pill the next day? How likely is pregnancy or is it likely the next period will be messed up?
Pregnancy is possible because you were at your fertile time of the month, so Plan B may not work for you. It's less reliable than regular hormonal birth control at the best of times, but it works by delaying your ovulation until the sperm leaves your body, & if you're close to or on top of ovulation, then you should use one of the other methods of emergency contraceptive, either the other emergency pill called Ulipristal Acetate (Ella), or to have an IUD fitted by a doctor. Either of those things can be effective if done within 5 days/120 hours of the unprotected sex.
If you're outside of that 5 day time frame, then it's just a case of hoping the Plan B worked, having time to delay your ovulation until the sperm leaves your body.
Your periods may be irregular for the next month or two, it's different for everyone.
- Plan B Information for Consumers
- Plan B Information for Healthcare Professionals (includes dosage details)
- Side Effects of Plan B (detailed)
Search for questions
Still looking for answers? Try searching for what you seek or ask your own question.
Updated 5 Jan 2016 • 1 answer
Updated 9 Aug 2015 • 1 answer
Updated 9 Dec 2017 • 1 answer
Updated 22 Sep 2018 • 2 answers
Updated 15 Oct 2018 • 1 answer