What should a menstruating woman do to find peace, as she feels guilty for delaying the performance of Fajr prayer? And is her apprehension about attending her friend's wedding party due to the delayed prayer justified, or is it a demonic whisper?

If a prayer is missed due to unintentional sleep, there is no sin upon the Muslim, for the Prophet, peace and blessings be upon him, said: "There is no negligence in sleep." The missed prayer must be made up immediately upon waking, which is more cautious, or it can be made up at leisure if it was missed due to an excuse. If you missed the prayer due to sleep and then menstruation began, you must make it up immediately upon becoming pure from menstruation. This does not affect your normal life or God's protection of you, as long as you intend to make it up once the excuse is removed, in accordance with His, the Almighty's, saying: "So fear Allah as much as you are able."