hello, im 18 and have started my first packet of birth control 10 days ago. im on carazette, whenever i started taking it i wasnt on my period but the doctor said i could start it as my period was due that week, my period came on wednesday (today last week) as normal and should have ended on sunday. towards the end as usual i started having brown blood as my period was coming to an end, but 3 days after my period should have ended im still experiencing brown substances down there. its not excessive i dont have to wear a pad or anything, but whenever i wipe its there, its very mild, but i noticed there is some blood, im a bit concerned as this has never happened before, is this a side effect of my pill or something else? im very worried.