A 35-year-old multiparous woman (2 living children) presents to the gynaecology clinic 6 weeks after insertion of a copper T 380A IUCD for contraception. She reports heavy menstrual bleeding and severe dysmenorrhea since insertion, requiring frequent changes of pads and occasional absence from work. She denies fever, abnormal discharge, or pelvic pain between menses. Pelvic examination shows a normally positioned uterus with no adnexal masses or tenderness. Transvaginal ultrasound confirms correct IUCD placement in the uterine cavity. What is the most appropriate management?