Answered by Ustadh Tabraze Azam
1. I went to sleep without having my period. When I woke before sunrise but after the Fajr prayer time has entered I was menstruating. Should I make up this Fajr prayer?
2. Once my period ended, I was unsure whether or not it ended before or after the time for Dhuhr prayer. Should I pray it just in case?
Answer: Wa alaikum assalam wa rahmatullah,
(1) No, you do not need to make up the prayer in which the menstrual period began. The basis is that if you are menstruating at the end of the prayer time, you do not need to make up that prayer.
(2) You should use a kursuf to determine the end of your menstrual period. [see: White Discharge and Preventing Discharge from Breaking Wudu]
[Ibn `Abidin, Manhal al-Waridin min Bihar al-Fayd `ala Dhukhr al-Muta’ahhilin fi Masa’il al-Hayd (268)]
And please also see: Discolored Menstrual Blood & When To Stop Praying
And Allah Most High alone knows best.
Checked & Approved by Shaykh Faraz Rabbani