This might sound odd but I know that the menopause can cause emotional changes.
I've had a few nights recently where I've been dropping off to sleep or woken from sleep to a feeling of absolute dread and horror, so strong it's almost physical. It's not the same thing as ordinary night time worries but something more like the very physical freezing in fear that comes with a nightmare and a real crushing feeling of hopelessness and despair. Once I've got back to sleep (which can take a while) I then feel fine.
Anyone had similar? I don't have any MH issues and am generally happy and have no reason to feel like this- it really feels like something physically-based despite it being something I feel, if that makes any sense. I'm 45, on Cerazette, just started using Ovestin, no other menopause symptoms except occasionally feeling a bit doddery.