When you said HRT it read as if you wanted estrogen +micronised progesterone. Have I misunderstood?
Micronised progesterone has been around for decades but was used mainly for fertility (and still is, to prevent miscarriage, AFAIK.)
On its own, micronised progesterone is not 'HRT'. It's one part of HRT for women who have a uterus.
I'm sorry if you know this and I'm confused!
It's only relatively recently that it's become more popular as part of HRT (ie the last 10 years or so.)
If you're wanting it to offset the side effects of another drug you're on, I'm not sure if you need a menopause specialist, but without knowing what you're on, what it's doing to you and want to get off, hard to say.
and have consulted various experts who say this is usually considered safe and that there is actually some evidence that progesterone actually reduces the risk of recurrence for women who've had my type of cancer.
Can't they prescribe it for you?
I hope you find some answers.