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Northridge, CA
A 25-year-old female asked about a 27-year-old female:

On bc 4 months. had unprotected sex 6 days after period, & brown breakthrough bleeding for the 1st time on this pill 5 days after. should i be worried?

1 doctor answer6 doctors weighed in
Dr. Jane Van Dis
Obstetrics and Gynecology 19 years experience
Not likely: If you haven't missed any pills then the likelihood of you being pregnant is very low. It can be normal to have some breakthrough bleeding, even on the birth control pill. Chance of pregnancy using birth control perfectly over course of year is around 4-6%, so pretty low. But not zero. Good luck!
Last updated Apr 13, 2016

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