Probably the symptoms of overactive bladder is nothing to do with the IUCD. Better give a urine sample for culture and sensitivity test. If it's negative, start on Tab. Mirago 50 mg once a day for one month and see the response. If it's useful, continue the medication for 3months. If it's troubling you further, may have to consult a Urologist. Better to get a ultrasound examination of abdomen and pelvis if symptoms persist.
Next Steps
avoid excessive fluids in the evening and night