Hi CE1976. I hope you're doing OK and feeling reassured by the previous posts.
I just wanted to say that I felt exactly like you when I had bad fatigue. I had never known anything like it - even lifting the kettle felt like hard work. My whole body felt weighed down and it was really scary. Plus I had all these other random things going on - lots of joint and muscle pain, tinnitus, sinus issues ... even BO which I had never had before ... the list goes on, and, like you, my sleep was not good.
I also thought on many occasions that the docs were missing something, although my docs at the time were no way near as thorough as yours seem to have been - mine were quite dismissive and it took a while for me to get the HRT from a new and much better GP.
I'm happy to say that the HRT, which I started using in July has dealt with the fatigue (and the aches and pains and lots of the other things have improved too) and that's made me realise that, for me, it was definitely hormonal.
It's not all plain sailing and I have been struggling with anxiety still, and bad sleep - but that is also improving now since I came here and got some really helpful advice.
So, I guess I just wanted you to know that you're not alone, and that things can change and improve.
xxxx