I have been spotting brown for six days mid-cycle, but i am on the pill. i was late with a pill last cycle, but my period still came. what's going on?

See you MD: There are many different reasons for missing a period. Your md will ask about your history. Age , medical conditions like thyroid disease and diabetes, life stress, strenuous exercise, and eating disorders are a few things which can affect the menses. A blood pregnancy test may be considered.

Breathrough bleed: Breakthrough bleeding (bleeding at the wrong time) is very common on birth control. It happens in about 1/3 of users. Its no big deal and usually self corrects over time. If you are not satisfied or it continues to happen then consider using a different birth control method. It is a common side effect and does not mean something is wrong or that the pill is not working.