Something really weird happened with my period?

So I had sex with this guy and I had my period 1 week before we did, I'm on birth control where you don't have your period for 3 months and I've had my period for 10 days what do you think is wrong?
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+1 y
Had my period for a week and then didn't for a week and then had it for 10 days and yes I took my birth control everyday consitantly
Something really weird happened with my period?
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