Not getting your monthly period is a classic sign of severe malnutrition. And it is not all caused by mercury, either. There are women with some mercury fillings who are regular as clockwork, and have no PMS or cramps or anything else. I was one of them. (I have undergone the Change so that's why I say "was".)

I do understand that toxicity (of any kind) and deficiency go hand-in-hand, that they cannot be unscrambled. We have to work on both. However, one state usually predominates, and it sounds to me like you need to nourish, nourish, nourish, until your toes curl. Then the mercury part will be easier to deal with.