I have the I D Mirena for 6 months now. It was reinserted after my 5 years. I have always had my periods on time every month. This month my period was due around about the 2nd give or take a day or 2. I never got it. A week after it was due I started getting period like cramps, headaches, lower back cramps and some nausea. Today is about 2 weeks late and I had a negative hp test last week. Is it possible that I could be pregnant with the IUD?