I am 24 years old and I have a 4 year old, I received the mirena about 6 weeks after the birth of my son. Everything has went perfect till now. I have always had some what of a period while having the IUD, it was not anything big just spotting and cramping and now I have had no signs of a menses in 3 months. I have some serious fatigue and all I want to do is sleep. I have been having mood swings and my breasts are very tender and seem to be getting bigger. I get nauseated through out the day and urinate frequently. I have taken a home pregnancy test that was negative but can't shake the feeling of being pregnant. Is there a possibility that I could be pregnant? Or is this an effect of the mirena?