hey
when i first started on my birth control
about a month into it a started getting
brown discharge...kinda of like really
light bleeding.
i had it for about a month...sometimes it
just happens because your body is
adjusting to the pill....
you should wait for your withdrawal bleed
on the pill....and after that if your
still worried just take a pregnancy test

hope i could help,
let me know how it pans out!