Hi, yes I'm another one with very frequent nightmares/bad dreams which wake me feeling absolutely dreadful. I get them usually in a pattern of every night for a few weeks at a time, often more than 1 a night, then they will stop for a few days. Mine go back at least 3 decades to around the time my thyroid disorder was first diagnosed, but they have become more frequent since menopause.
The association with night sweats is that raised body temperature can make us more prone to them, as can chronic insomnia - vicious circle. Pre-menopausal women are apparently more prone to them in the 2nd half of their cycle because progesterone raises body temperature.
I found among other horrible effects, Utrogestan made me way too hot at night & wrecked my sleep, contrary to its reputation for sedation. The synthetic progestogens can also raise body temp & dydrogesterone (in the Femoston range) is said to be the only one that doesn't have this effect.
I sympathise with anyone who has them as they can be very frightening, leaving you too disturbed & alert to get back to sleep. The only thing I can suggest is to try to make sure you are not too hot at bedtime & to keep the bedroom as cool as possible.
Wx
P.S forgot to say hypoglycemia can also cause nightmares & blood sugar drops overnight while we are fasting, but it's worth looking at ways of keeping it as stable as possible throughout the day, as it becomes more prone to instability at menopause & if not well controlled can stress the body, causing knock-on effects at night. Some people find it helps to have a small supper of something like high protein natural yoghurt (e.g. Greek), with a little sugar-free muesli about an hour before bed. There are loads of threads on here about balancing blood sugar if anyone thinks they might benefit from looking into that.