When was the questioner's period of purity, and does she have to make up the night prayers?

A menstruating woman is not required to check for purity at night, but rather upon going to sleep and at the time of the Fajr prayer, because the default is to attribute the occurrence of ritual impurity to its nearest possible time. The two signs of purity are: the white discharge (al-qassah al-bayda'), or complete dryness (al-jufuf al-tamm). If a woman observes either of these two signs, she must perform ghusl (definition) (ritual bath) and pray.