This is a perennial problem with sequential HRT and I wish providers would not give women the impression that this treatment always or even usually results in a regular predictable 28 day cycle.
This is a myth, most women especially in perimenopause don't have a regular 28 day cycle to begin with, and micronised progesterone at standard doses is not strong enough to override your own cycle, however it can precipitate withdrawal bleeding in its own right.
The result of this is often chaotic bleeding, and more days spent bleeding overall than untreated women.
If you are under 50 I would always suggest considering a combined oral contraceptive, which if taken continuously can eradicate your cycle, keeping you bleed free and hormonally stable, and typically contains a more robust dose of estrogen than MHT.
If this is unsuitable I would consider an alternative progestin such as IUS, or continuous oral desogestrel at 150mcg or Slynd, which are likely to achieve amenorrhoea.
If you are really keen on micronised progesterone, you could try either taking it every day and stopping for say 5 days when you get your period, so the withdrawal bleeds match your own bleeds. This can work if you still have a fairly regular cycle.
Otherwise you can continue to take the progesterone 2 weeks on, 2 weeks off, or the first 12-14 days of each calendar month if easier, and accept the bleeding, which is a nuisance but not harmful in any way.