You didn't lucknout - 30% of Mirena wearers have no periods, but that doesn't describe you. So Mirena is neutral for you - it didn't erase your period. It is still not negative for you because the small amount of progesterone in it simply cannot be driving you over the edge. Maybe go to Planned parenthood, where there is a sliding scale, and ask for a trial of combination birth control pills taken non-stop to eliminate menstruation? Keep the Mirena in place, though