Taking Plan B can be nerve-wracking. You're hoping it works, but how do you *know*? While it's designed to prevent pregnancy after unprotected sex, it's not 100% effective. So, what are the signs Plan B might have failed?
The biggest indicator is a missed period. Take a pregnancy test if your period is more than a week late. However, spotting or light bleeding *can* occur even if you *are* pregnant, so don't rely on that as a definite sign.
Other potential (but less reliable) signs include continued pregnancy symptoms like nausea, breast tenderness, or fatigue. These symptoms can also be caused by the hormonal changes Plan B triggers, making them tricky to interpret.
The bottom line? Don't wait! The only way to know for sure is to take a pregnancy test around three weeks after unprotected sex. If you have any concerns, reach out to your doctor or a healthcare provider for guidance and accurate testing.