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Logynon is a combined pill containing Levonorgestrel
and since you have taken it for 7 days and then stopped you are having breakthrough bleeding
due to the use of the pill.It is a contraceptive
pill and is supposed to be used with caution and in proper course.Hapazard use like you did results in breakthrough bleeding;irregular periods;nausea;vomiting;dizziness;continuous bleeding which are common side effects of this pill.So please consult a Gynaecologist for proper examination and treatment as soon as possibel.