Is the continued discharge of blood after less than a month since the previous menstrual period considered استحاضة (istihadah - dysfunctional uterine bleeding), knowing that it is originally due to polycystic ovaries, and was light and brown, then increased?

If the bleeding exceeds 15 days, you are in a state of istihadah (definition) (prolonged non-menstrual bleeding). Refer to your previous habit. Otherwise, distinguish menstrual blood by its color, smell, and the pain accompanying it. If you cannot distinguish, then consider six or seven days of the month as menses, based on investigation. During the period of menses, refrain from prayer and fasting. Then perform ghusl (definition) (ritual bath) and pray, performing wudu (ablution) for each prayer after its time has entered. It is permissible for your husband to have intercourse with you during the time of istihadah.