I need help about period and pregnancy my question is...my girlfriend had her period and the same day that it end it. we had sex but the condom broke so we don't want to have kids just yet so we when to the pharmacy and got over-the-counter plan b. but 4

That : That can happen with changes in hormone levels, including from taking plan b. Keep an eye on it, and if her cycle doesn't normalize she can take a pregnancy test. Plan b is a type of hormone that can change the normal hormone levels and some patients do have spotting.

Plan B: Question was cut off. Plan B One-Step can reduce your risk of pregnancy by up to 95% if used within 24 hours of sex. If taken within 72 hours it can reduce risk of pregnancy by up to 89%. Emergency contraception symptoms can include spotting or bleeding, changes in menstrual flow or your period may be late or early. Take a home pregnancy test & notify your GYN if your period is 7 or > days late