Hello dear, Understand your concern. Mirena is a progesterone contain intrauterine device, long term contraceptive and reversible in action. It make the cervical mucus thick and make uterus unfavorable for implantation. Following are the side effect: 1. Irregular menstruation/delyed/eccessive period 2. Cramp pain 3. Dizziness and headache 4. Infection So bleeding/spotting after removal is normal SO mirena cause hormonal imbalance and cause delayed in period It will take around 4-10 weeks to become normal as body get adapted. Other cause of delyed period may be 1. High level of stress 2. Change in life style 3. Late ovulation 4. Excessive exercise 5. Drugs: Birth control pills, tyroid medication, Excessive tea and caffeine 6. Thyroid problem 7. Hormonal imbalane 8. Endometriosis: spotting Do regular walking and exercise. Eat healthy diet Eat fruits like papaya, orange and pomegranate Also note that Menstruation required co ordinate action of various hormone that secreted by ovary (estrogen and progesterone) and brain (FSH and LH). If any above hormone is decreased or increased there is imbalance in menstruation. So please do full hormonal profile : Estrogen, progestron, LH, FSH, HCG and thyroid hormone if period will not come That help to diagnose hormonal imbalance. Also do Usg if nedded After confirmation you can take treatment according So please go ahead. Hope this may help you All the best. Stay healthy. 1.Tablet cetrizine 5 mg BD orally 2. Maintain hygiene 3. Wash vagina 4-5 times in a day with warm salted water 4. Wear pure cotton innerwear Hope this may help you. Best regards Dr. Sagar Hope this may help you Wish you good health Best regards Dr. Sagar