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A female asked:

I've had my period for two weeks now usually i only get it 3-4 days. i have back pains &cramps. i've been on the bc pill for 5-6 years?

1 doctor answer6 doctors weighed in
Dr. Mary David
Specializes in Obstetrics and Gynecology
Infection: The common causes of abnormal bleeding on birth control pills are missed pills, interaction with other drugs, and infections. The pain increases the likelihood of an infection. You need to be seen ASAP. Hope you feel better fast.
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Last updated May 29, 2016

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