When should a woman stop praying if she experiences turbid discharge, followed by light bleeding or mixed blood, and when are these discharges considered menstruation?

Turbidity (Kudra) is not considered menstruation unless it occurs during the usual period [of menstruation] or is connected to blood. If it occurs during your usual period, you should stop praying. But if it occurs outside your usual period, you should continue praying until you see blood. When you see it, you should stop praying, and any turbidity connected to it will then be considered menstruation.