I'm on my second Mirena coil (have had them for over a decade). I don't have periods at all with this coil. But I'm now 45, and wondering how I will know when I start getting menopausal. I had a blood test and asked for my FSH level recently, and this was 7.7 ("normal"), so I assume this indicates it's not yet. But how will I know?! Many thanks in advance.