question: I have the mirena iud and for about a week now, I have had sharp, stabbing pain in my lower belly, right side. I have also have really light spotting, really dark brown in color. My lower back hurts, I have a headache, and I am light headed. I have also had nausea and been throwing up after almost every meal. I tried to call my ob today, and she can t get me in for at least two weeks. Should I go to the er?