So I have a 7 year IUD. I have had the IUD for  about two years now and I always got very very light periods.  My boyfriend has been away for four months and when he got back we obviously had some catching up to do.  Well I didn't get any sort of period that month.  I took to pregnancy tests and they both came back negative.  Is there still a possibility that I could be pregnant? Or has the IUD made my period go away. I'd rather not be pregnant yet, I have one more year of graduate college and would like to finish.