Is it obligatory to make up prayers missed due to an error in estimating purity, and what is the ruling on prayers performed with doubt about purity or the performance of some of their pillars, and is one sinful for delaying the making up of these prayers?

A woman knows she is pure from menstruation by one of two signs: complete dryness or seeing the white discharge. As long as she is in the menstrual period, yellowish or brownish discharge connected to blood is considered menstruation. If the ritual bath (ghusl) is delayed beyond its time, the missed prayers must be made up according to the majority of scholars. As for obsessive thoughts (waswas), they should be dismissed and not given attention. In case of doubt about the number of prostrations, one should act upon the higher number. If doubt occurs after completing the act of worship, it should be disregarded. Regarding sending blessings upon the Prophet, peace and blessings be upon him, there is a difference of opinion regarding its obligation, and there is no harm in following those who consider it desirable.