Seeing no blood then having yellowish or dark discharges

Q 4: We know that purity from menses is discerned by two signs; the first is the complete cessation of bleeding, and the second is the emission of the white vaginal discharge. My problem is that the menstrual blood completely stops, then after a few days I see the white discharge. Sometimes, I see the white discharge followed by Kudrah (dusky-colored vaginal discharge during or after menstruation) and Sufrah (yellow vaginal discharge during or after menstruation). What is the ruling concerning each of the cases I mentioned? May Allah bless you. I hope you will give me the answer supported with proof. I would also like to know the difference between Kudrah and Sufrah. A: When a menstruating woman sees the sign of Tuhr (purity from menses signaled by white discharge or complete cessation of bleeding) and she performs after-menstruation Ghusl (full ritual bath), she should pay no attention to Sufrah or Kudrah that comes out after this, as they have no effect. This is because Um `Atiyyah (may Allah be pleased with her) said: "We used to consider Sufrah and Kudrah after the period has ended as nothing (i.e. not menses)." (Part No. 4; Page No. 223

A: When a menstruating woman sees the sign of Tuhr (purity from menses signaled by white discharge or complete cessation of bleeding) and she performs after-menstruation Ghusl (full ritual bath), she should pay no attention to Sufrah or Kudrah that comes out after this, as they have no effect. This is because Um `Atiyyah (may Allah be pleased with her) said: "We used to consider Sufrah and Kudrah after the period has ended as nothing (i.e. not menses)." (Part No. 4; Page No. 223) May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.