Hi HRicardo
Never heard of that one! Very doubtful that Utrogestan can cause this but with some women including me, it gives rise to very vivid dreams which disturb sleep ( along with increased bladder frequency) so maybe something like this is causing you to clench your jaw.
Do tell us a bit more about yourself, where you are in menopause, how old you are, what your HRT regime is etc.
Yes Mirena coil is very effective in protecting the endometrium when taking oestrogen as part of HRT and depdning on your age is a contraceptive too, though I doubt it has the same sedative effects as progesterone, which is one if its properties (like pregnancy fatigue).
Hurdity x
