Breakthrough bleeding is a side effect of almost any birth control pill. Not every pill is going to work for your body, you might need a different brand, a different dosage, etc. I suggest telling your doctor that you are experiencing breakthrough bleeding and together you can discuss if you should change your birth control or not.
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"A wise girl kisses but doesn't love,
listens but doesn't believe,
and leaves before she is left"
-Marilyn Monroe