Mirena removal/reinsertion? Early menopause side effect?

I had a Mirena coil inserted just under 5 years ago. It is due to come out shortly. Since having it inserted the strings have disappeared inside so I'm terrified about geting it removed. I am going though early menopause which started 4 years ago. (I'm 40 now). I don't now if this is a rare side effect or not? Is it worth getting another inserted?