How can a woman whose menstrual period ranges between seven and eight and a half days determine the exact sign of purity, especially since she does not see the white discharge (al-Qassah al-Bayda’), and intermittent yellowish discharge (Sufra) continues to appear after the days of menstruation, which causes her confusion and obsessive doubts regarding the timing of ghusl (ritual bath) and prayer?

Yellowish or brownish discharge connected to menstruation is considered part of the menses as long as it occurs within the possible period (fifteen days). If the bleeding stops, it is no longer considered menses except during the regular menstrual period. So, if your regular period is seven days, any yellowish or brownish discharge you see during these days is considered menses. After that, it is not considered menses unless it is connected to blood. The signs of purity are dryness or the white discharge. Whenever a woman sees a sign of purity, she must perform ghusl (ritual bath). If bleeding resumes after purity, you are menstruating. If it is yellowish or brownish discharge, it has the ruling of menses during the regular period. However, yellowish or brownish discharge after achieving purity and the expiration of the regular period is not menses but rather istihadha (irregular bleeding).