so I have had the mirena IUD since march 12,2012 and it is now September 15, 2013 , my concern is that I have been missing my period that I have been getting since I had my IUD every month lasting for weeks first week spotting hen second regular flow. My last period was July. I have been getting sharp stomach cramps latly like period cramps ( reason for the IUD) but know period, and no I m not pregant (LESBIAN).Any suggestion????