Well, that's very interesting because the symptoms I have only started after HRT as well....
In more detail, I started HRT 2 years ago (43yo) and it immediately fixed all the low estrogen symptoms I had (joint pain, constipation, ringing in my ears, brain fog, not being able to read, etc etc)... and for 3 weeks everything was lovely. I'd been told to start on a 25 patch for 2 weeks and then increase to 50. I don't know if that had anything to do with it, but after a week at 50 (3 weeks overall), I was hit with these severe night time symptoms I've battled ever since.
As I lie down at night and get sleepy, my heart beats hard and faster than usual (95bpm) and I get inner tremors. Mild version is a tingling in my feet. Severe version is in my core and it can feel like the bed is moving under me. Then, every time I begin to fall asleep, I get hypnic jerks where I am startled awake. End result = severe insomnia.
I have tested and treated and done everything I possibly could. Of course I tried stopping the HRT since that is what started all this - only I stopped it for 5 months and it didn't really do anything. Perhaps the symptoms were less intense but they were still there. And I got all the low estrogen symptoms back. So then I began HRT again and gradually increased and this time didn't notice any change when I re-started it. I said at the time to doctors "it's as if the HRT has started a process or a change, in something else - it's not a direct HRT thing, it's affected something else..."... (my theory now is it affected my thyroid)
Thyroid panels were coming back 'normal', even when I did private advanced ones. Until someone suggested I get my reverse T3 tested. Which I did, and it was sky high (33) with a low and only just in range T3. It looked like a conversion problem because I had high/good T4. So then I was given T3 to clear the rT3. I had to go private for that. And there was a lot of fiddling around and I was given some T4 as well. Things now are much better than they were but I'm not quite there yet. On a good night I will go to sleep within an hour and then I will be 'trying' to stay asleep towards the end of the night. I have trazodone for bad nights now... I've avoided anything stronger.
I have no idea at the moment what's going on and whether it is my thyroid or not. The big picture view is I'm much better than I was last year. So I'm increasing T3 and estrogen and giving things time. But I don't want to end up superstitiously on thyroid meds for the rest of my life, especially not T3 - so at some point I plan to move to more T4 and see if I can convert that, and if I can, to wean off thyroid meds.... and see what happens. But I really want things to be good before I do that, and stable - so that the difference is very noticeable to me.
I am probably waffling now but that's my plan anyways.... I'm with Newson for HRT too. My advice is sadly just go private. It sucks. But you get what you want, fast.