there are a couple of possible explanations for this light spotting. the most common one would be light breakthrough bleeding due to the hormones in your birth control pill (bcp). with prolonged bcp use the lining of the uterus can become thinner. this can make it easier for spotting to occur. often such spotting will present after intercourse or even heavy exercise. typically it does not develop into a full on "period-like" bleed. other reasons for spotting after sex can include problems with the face of your cervix. for example if you have a new infection with chlamydia that can make the cervix friable (easier to bleed when touched by fingers penis etc). if you had a polyp in the cervical canal the polyp tissue is very fragile and bleeds easily. . my best guess is bcp caused spotting. if the spotting persists or you have risks for chlamydia (e. g. new partner or multiple partners) you should see your gyn of clinic for follow up. if the bcp is the culprit for the poor cycle control a change in bcp formula or brand can be helpful.
i am on birth control. i experienced light bleeding for a couple of days after my cycle ended. what could be happening?