Thanks for posting your query.
is an oral contraceptive
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.