the delay in your girlfriend’s period is most likely due to the effects of Plan B and stress rather than pregnancy. Emergency contraception like Plan B can disrupt the menstrual cycle, causing periods to come earlier or later than expected, and symptoms like breast tenderness are common side effects. Since she took Plan B on March 6, it could easily shift her cycle, especially if her periods are already somewhat irregular and she has been under significant stress, both of which can further delay menstruation. The second sexual encounter on March 24 had no ejaculation inside, which makes the risk of pregnancy low, though not zero. At this point (more than 2–3 weeks after March 6 and about 10 days after March 24), it is appropriate to take a home pregnancy test now for reassurance. In summary, this situation is more likely hormonal and temporary, but taking a test will help confirm and reduce anxiety.
Plan B can indeed cause a delay in your girlfriend’s menstrual cycle. This emergency contraceptive has a high dose of levonorgestrel, a synthetic hormone that can disrupt the normal hormonal pattern, affecting the timing of the next period. Often, Plan B may cause the next period to come earlier or later than usual, with some women experiencing a delay of up to a week or more. Given that she took Plan B on March 6 and her period hasn’t started as of April 3, it’s possible that the medication could be a contributing factor to this delay. However, since there’s also the factor of having unprotected sex on March 24, even without ejaculation inside, there’s still a potential risk — albeit lower — of pregnancy due to pre-ejaculate fluid, which can contain sperm.
Considering these factors, it would be reasonable for her to take a pregnancy test. Home pregnancy tests are quite sensitive and can be accurate from the first day of a missed period; in her case, with her period already being late, now would be a good time to check. If the test is negative and her period remains absent, she might consider repeating the test a few days later, as sometimes the hormone hCG can take time to build up to detectable levels. Meanwhile, keep an eye on any other symptoms like severe cramping or unusual bleeding patterns that might warrant further medical evaluation. If her next period is also delayed or irregular or if there are other concerning symptoms, consulting with a healthcare provider for a more thorough assessment would be advisable.
