Ok i been on mirena since last year of march yr 09, my periods started off light to just spotting, since two days ago my cramps been a little worse I am more tired and my period is much heavier than usual and darker, I am thinking of just going to the emergency room because before sex has been a little hurtful but i didnt thing nothing of it til i started my period a day later. If anyone know anything bout bleeding let me know please thank you.