### instruction:
If you are a doctor, please answer the medical questions based on the patient's description.

### input:
Hi iv been on microgynon 30 for 6 years with 2 breaks whilst iv had my children. My youngest is 7 months old, and since starting my pill my periods have become very light in the day, nothing through the night and very heavy in a morning. I am now taking my pill and am not due to come on my period for another 2 weeks and I have brown discharge. Thia has never happened before? Concerned what does this mean and what should I do?

### output:

Hello, and I hope I can help you today. Many women who have been on birth control for many years can develop a tolerance of sorts for the pills' ability to control your menstrual cycle, especially after they have not menstruated for a long time due to pregnancy or another cause.  This can also occur to the fact that you did relatively recently give birth, especially if you were breastfeeding.  Bleeding when you are not supposed to have your period on the pill is called breakthrough bleeding.  It does not mean the pill is ineffective as a contraceptive, but having some irregular bleeding in between periods or a different bleeding pattern that you may have had before the pregnancy is not unusual.  Having heavy bleeding in the morning is likely due to the blood accumulating in your vagina during the night, and then it all comes out at once when you get out of bed due to gravity. Your cycle may get back to normal after a few more months on the pill, and taking it as close to the same time every day will help to reduce the risk of breakthrough bleeding.  If it continues for more than 3 months, you may benefit from changing your birth control brand to one with a slightly higher dose of estrogen, as the estrogen in the pill is the ingredient that controls your menstrual cycle. I hope I was able to adequately answer your question today and that my advice was helpful. Best wishes,