The trouble with insomnia is after a while it becomes a mental thing if you know what I mean, so our thoughts about it and the fear of not sleeping make it a lot worse. So to sort your head out there is a book I rate by Guy Meadows called the Sleep Book. I highly recommend it as a calming influence on your overwrought and worn out mind. I don't rate any of the OTC stuff tbh once it gets engrained apart from a good quality CBD oil, takes a few days to kick in. My other suggestion would be to consider utrogestan as that side of your hrt, it helps a lot of women but not all. And finally oestrogen levels - too low or too high. Too low is generally waking up lots and unable to get back to sleep, too much and it's like you have had a bucketful of caffeine and can't even fall asleep. Again this is a generalisation and you have potentially a bit of trial and error. You haven't had a nasty virus by any chance, I think that can screw up your levels sometimes? It's awful I know but I went through a terrible month where I thought my ability to sleep was totally fucked and now I am ok again. You will be too x