I'm a 20 year old female, 125 lbs, exercise everyday, and eat very well. I recently had an the mirena IUD put in after a year on depo provera. I cramped for about a week after insertion and then started to have pain on the left side near my pubic bone. I also was having nausea, blurry vision, difficultly focusing my eyes, dizziness, severe chest pains, and a pin prick sensation along with hot flashes all over my body. After finding this site, I called my doctor who didn't believe that the mirena was causing this, even though many of these are listed as severe side effects. I'm a 20 year old woman! Why would i suddenly develop some disease that made me feel this way? Despite her claims that the mirena wasn't responsible, the chest pains were unbearable and the uterine pain was shooting down my legs. I demanded to have it out. One day later the uterine pain was significantly better and my vision was back to normal. I still have slight chest pains but they have diminished appropriately. the hormone in mirena has a half life of about a day and a half so in two days it should be completely out of my system and the chest pains should subside. To conclude, if you are having these side effects and have no other conditions, try getting the mirena removed. It fixed me completely.