I'm new to this stuff, but I had my mirena IUC in for 4 1/2 years with no periods at all the whole time and it fell out 4 weeks ago and I've had a lot of unprotected sex since then! I had very very light spotting two days after it fell out for only a day but nothing since then! Took two hpt one negative and one positive! Then I went to my local planned parenthood and had them test me and that was negative! Has anyone gotten pregnant immediately after the mirena was out?!? Please help!!!!