I had my mirena IUD for a year. I had the IUD removed the first week of April 09. I had my period the week of the 12th in April. I have not had my period since and I took a pregnancy test today may 20th and it was negative. Why haven't I had my period could I still be prenant. I hope I am and am curious to find out. I have been cramping, tired and have had sore breasts.