I am nursing and my daughter is one year and one month old. During breastfeeding, I do not have a menstrual cycle. I had an IUD inserted a week ago and noticed light bleeding at first, and the next day I saw nothing, so I purified myself and had intercourse. Then I noticed that the bleeding did not stop and continued heavily until today. Is this menstrual blood or irregular blood, and does it require purification or just ablution?