I took Plan B 1 day before ovulation (around 12pm), but had sex the same night (around 11pm-12am) and he came inside.
You were certainly at the worst possible time to have unprotected sex! However, unless you know for sure (via months of monitoring your ovulation), that you were to ovulate the next day, you may have already ovulated, or have been ovulating at that time, or have not yet ovulated. Not every woman ovulates on day 14.
Plan B is said to be 95% effective if taken within 12 hours of unprotected sex.
It is 'thought' to work in several ways:
By delaying ovulation
By thickening the mucus in the vagina, in order to prevent the sperm meeting with an egg
By making the lining of the womb unsuitable for a pregnancy to develop
The hope is, that if it was too late to delay ovulation, Plan B might prevent pregnancy in the other 2 ways.
However, the manufacturer can only be certain of it often working to delay ovulation, so the other two ways, are not factored into the 95% effectiveness, as far as I'm aware.
Unfortunately it is impossible for me to say whether it worked to delay your ovulation. There is also no way to know if it was effective as emergency contraception, until you either get your next scheduled period (not any bleeding before that), or you miss it & can take a pregnancy test.
Your next scheduled period may be late, as that's common with Plan B. You can still do the pregnancy test when it would have been due, though. Sometimes the period is up to a few weeks late. We see that in posts a lot on this site.
You may get bleeding in between now & your next period. This may be anything from spotting (pink/brown/red) to heavy bleeding.
You may also experience hormonal symptoms for a couple of weeks, such as mood swings, fatigue, cramps, tender breasts, back ache, spots etc.
If you are within 5 days of the unprotected sex, & want to use another form of emergency contraception, to be sure, then you can have a coil/IUD fitted by a doctor/clinic. That can remain in place afterwards, as longer term contraception.
- Plan B Information for Consumers
- Plan B Information for Healthcare Professionals (includes dosage details)
- Side Effects of Plan B (detailed)
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