I have always bled heavily, even when my uterine scan showed no build up to shed, I bled and bled in the following days anyway.
I'm three years PM and have tried;
Provera - useless and horrible, repeatedly gave me a flu like illness on contact
Utrogestan - useless and painful in the tummy
Norethisterone - nasty & still bled
Cyclogests - I was fed up by now because each one needs three months trial, I gave up when cyclogest made me feel suicidal on day three. It might have worked, but I doubt it.
None of the above worked to alter my bleeding. Even taking doses so high I couldn't function for huge chunks of time and lost my job.
However;
In my thirties I had a mirena coil and it stopped my bleeding completely from the four month mark until it was removed, a few years later.
I won't get another mirena because it caused me depression and the doctor refused to remove it for me, I had to do that bit myself, he gave me ADs instead.
Maybe if I could have tolerated the side effects of any of the other Ps long enough, they might have done something eventually, but it definitely didn't seem worth it to me. Bleeding is better than feeling like your life is worthless and all the Ps do that to me.
Now I'm on tibolone, it's supposed to be offered on the NHS to all PM women with progesterone intolerance who want HRT while keeping their uteruses. Even with that, I still bleed every month, but it's normal and it gets checked with scans.
It's not approved for use yet in the USA and that means there isn't the marketing for it, therefore the NHS forget they should use it, but they say that tibolone stops bleeding in most women.
I hate the way they state how the majority of women are this or that so let's put a full stop on the end and close the research because we found out how 80% of women react, like that should be enough to shut us up!