When must I pray, considering my menstrual cycle which begins with a brown discharge, followed by blood that lasts for four days, then becomes intermittent and less, then turns yellowish and continues to be intermittent and less for two days, then stops for another two days, and then is followed by an intermittent white discharge for four days?

The brownish discharge that appears during the menstrual period, accompanied by its symptoms, is considered menstruation. A woman must consider herself menstruating from its onset. If the bleeding stops before a white discharge appears, she must consider herself pure and perform ghusl (ritual bath). If the bleeding stops during the cycle and she sees dryness, she should perform ghusl and pray. She counts the days of menstruation until the end of her usual period, or fifteen days if she does not have a regular period. After that, she is considered to be experiencing istihada (non-menstrual vaginal bleeding).