What is the ruling on performing ghusl fifteen days after menstruation, while faint yellow discharge is still present and complete purity has not been observed?

Yellowish or brownish discharge is considered menstruation if it occurs during the usual period or is connected to blood. A woman recognizes purity by dryness or by seeing the white discharge. Any brownish discharge connected to blood is considered menstruation. If the discharge stops and she sees dryness, then any yellowish discharge after that is not considered menstruation. The presence of vaginal wetness connected to blood does not prevent purity. A woman is not considered to have irregular bleeding (istihada) unless the blood and any connected yellowish or brownish discharge exceeds fifteen days.