What is the ruling on the prayer of one who suffers from obsessive thoughts regarding purity, wind, and incontinence, and repeats the prayer many times, and when she resolved to repeat it after finishing it, she found menstruation? Does she have to repeat it after menstruation? And is her prayer invalidated because she intended to repeat it?

There is no cure for obsessive thoughts except to ignore them and pay them no mind, and not to indulge in them, no matter how numerous or intense they become. Do not repeat the prayer, no matter how much Satan whispers to you about something having exited, unless you have absolute certainty. Nor should you repeat it for lack of devotion. The prayer you are asking about is valid, and you are not required to repeat it after purifying from menstruation. These obsessive thoughts do not harm you. Indulging in obsessive thoughts leads to great evil.