I have only had mild ear ringing a few times. However, I have had ear fullness and vertigo and it is always toward the end of my period and last about a week. I feel like my ears are clogged, I get dizzy almost as if I am falling over. I always think I am getting and ear infection. I work in a hospital. I have had the nurses or ER Doc look in my ears multiple time, but they never see any thing except maybe a tiny bit of fluid. I feel like I am crazy, but it is real, it is there. I'm sorry you are having the ringing. I do think it is mirena.