Hi sohot
Several things occur to me
First - as you are only 50 as others have said it could be that the dose is too low to get rid of the tiredness.
Secondly - it could be that you are reacting to the progestogen in Evorel - which is norethisterone. The British Menopause Society recognise that artifical progestogens - especially when given continuously as they are with conti HRT can give rise to constant low-grade progestogenic side effects. I've never expereinced jet-lag but I get hang-over type feelings, cotton wool head - feels like it might explode, sometimes migraine - when on the progesterone (sometimes!).
I would suggest you do as Dancinggirl recommends - if the Mirena suited you then definitely go back to it. and gel would get over the problem with patches and you would be able to adjust the dose easily.
Re patches - I use Estradot - oestrogen only patches - they are tiny so hardly any problem with grey squares. I put them on the bum cheeks, but the grey squares are small and easily confined to within my knicker area (if you don't wear thongs that is
).
The other alternative is to return to a cycle so that you only take progesterone for part of the time - for progesterone intolerant women a long cycle is better - or short course of (Micronised) progesterone - but this should only be done under the supervision of gynae because there is a greater chance of thickened lining.
If your doctors aren't helpful and don't know much about menopause/HRT the only alternative is to ask for a referral to a menopause clinic if there is one near you, or else read up so much about it that you can just ask them for what you want!
I definitely would not be reducing oestrogen at you young age! You are still younger than the natural avergae age of menopause.
Finally declining testosterone can cause fatigue but I would only investigate this option (not generally available on NHS) after trying all the other ideas - including thyroid testing as CLKD suggested.
Hope this helps
Hurdity x