It's been a longish road here. Sorry for long post!
Started hrt aged 44. Clear symptoms of meno, mainly horrific aches and pains and brain fog. Tingling fingers, insomnia, lack of concentration. The odd hot flash but over heating at night had gone on for a couple of years. Really bad doms after exercise.
37.5 was great for a while with cyclical utro vaginally . Had libido.
Caught covid and was quite ill with long covid lasting about 5 mo. About 2 months in libido completely went despite going to 50 and 3 months in hot flushes were back.
Blood tests showed 135 oestrogen so upped to 75, but I really struggled with water retention etc. bloods after 2 months still showed room for increase (still about 250) I still had symptoms.
Periods were erratic and barely there despite cyclical regimen. So went to continuous (it had been 9 months on hrt) and slowly moved to 100 patches(I had to go up in 12.5 stages as too buzzy). I'd been using Utrogestan vaginally as found it too dopey but now found I could tolerate it and in fact it really helped water retention and even some aches. Libido even slightly returned but still having some symptoms.
A friend I spoke to in the autumn who is a Gp and had meno training mentioned using higher utro on higher levels of oestrogen which my Gp was happy to do, though would usually do if over 100. This helped more with sleep and I didn't have negative side effects. I actually think it helped joints too as well as my gut surprisingly. Have had histamine intolerance and loose stools for a while.
I had a private testosterone test last autumn which showed low. I mentioned to Gp a few weeks ago at review. I still wasn't fully ok libido wise and still have some brain fog.
She actually prefers to test testosterone and shbg before starting. Checked oestrogen and thyroid (always does as I'm on thyroxine and symptoms could be thyroid or oestrogen. Not sure if she would with others.) oestrogen was strangely still around 200 so she suggested going to 125 patches and trial testosterone at the same time as was showing very low range when FAI calculated. Testosterone was low out of range. I've only just started so can't comment.
I also have topical oestrogen for doon there but have found I don't really need it as much now.
So I do think it's worth looking at oestrogen levels and also possibly progesterone levels. I noticed that did help with a number of things.
I found the mood swings too much on cyclical and find being continuous is better for me (actually doing the 25/28 thing at my request) Bleeding has been a bit erratic but ok and still settling into this. I've also had a lot of viruses and illnesses plus another bout of covid so don't expect things to settle for a while.
You would normally try to optimise oestrogen as much as possible as that could be what's needed for all the things testosterone is used for. Also progesterone.