Hello, Thanks for posting your query. Microgynon is an oral contraceptive containing ethinylestradiol and levonorgestrel. These hormones act by overriding the normal menstrual cycle. On stopping these pills, normal periods should resume in 2 to 4 months. You can wait up to 6 months for your natural cycle to be re-established. A longer delay indicates some other hormonal problem that needs to be looked into. Light brown discharge indicates very scanty periods that is taking a long time to come out. Hence the color change. It is advisable for you to be seen by a gynecologist who will examine you and give the correct treatment. It will be necessary to do blood tests to rule out anemia and assess thyroid hormone levels too. Regards