Thanks for your message @JinglingHellsBells, I have replied, but will post here in case it's helpful to others reading later.
I was referred to a consultant as I have various thrombophilias (discovered during a history on long & complex fertility treatments). Plus elevated red blood cell levels that they can't explain currently, although personally I think it's more likely to be 2 or 3 blips or just part of general thrombophilia (rather than pointing to a secondary more worrying cause of polycythemia). Plus had ovarian cyst removed last year and GP wanted all menopause discussion looped in with that.
I was fine researching and recommending HRT for myself really, but GP got cold feet and wouldn't prescribe. I've seen a couple of private consultants, mostly due to the time lag of covid - I wasn't getting anywhere for over a year with the NHS referral.
The private ones charged me some more for the same blood tests, which aren't massively conclusive anyway. One said do both oestrogen and progesterone, one said do progesterone only and DHEA.
I know what my hormone panel has looked like in the past, and what seems to be happening now is a decent egg reserve still but progesterone and oestrogen not quite in sync and fluctuating, rather than particularly low oestrogen in itself.
I thought about doing progesterone only but when I eventually had a phone consultation from the complex menopause clinic at imperial they said they thought symptoms more indicated oestrogen deficiency especially in luteal phase. So given that I'm now fed up with the whole thing I've just done what they said!
Which was 4 pumps & then progesterone from day 17.
I may go down to 2 pumps in the light of advice here!