Hi, Hi, Thanks for posting in HCM. I understand your concern. Mirena is a type of long-acting, reversible birth control called a hormonal intrauterine device (IUD). After its expiry, fertility and menstruation is generally regained immediately. It may take a couple of months more for few individuals. In case you, since you are having certain symptoms suggestive of pregnancy as well as you have indicated to be sexually active, you need to check weather you are pregnant or not by getting a urine pregnancy test done. Depending on the result, kindly consult Gynecologist for appropriate evaluation and management. Hope the information provided would be helpful. All the best.