Would you take 2 tablets for 12 days, pause for 5 days or so and then go to 1 a day?
Pretty much that!
You are supposed to complete a cycle, so 12 days, then wait for the withdrawal bleed, and once it's finished, start Utrogestan daily.
The fact you are 52 and have used sequential for 2 years doesn't mean continuous is right for you yet. You might be- but on the other hand, you might not be post menopausal, and your own cycle may break through when using a low dose of Utrogestan.
This explains is well.
https://www.menopausematters.co.uk/postmeno.php
POST MENOPAUSAL -
Continuous combined therapies.
"Period free" or continuous combined therapy can be used by women who are 54 + yrs, or more than one year since last period at any age. [This means a natural period, not a withdrawal bleed.]
The criteria should be fulfilled in order to offer such treatment to women who no longer have a continuing ovarian cycle, so that steady levels of both estrogen and progestogen can be achieved.
When there are steady levels of estrogen and progestogen from daily administration of both, the womb lining stays thin. Although some bleeding in the first 6 months of therapy is common, there should not be bleeding after that and the lining does not go through the stages of stimulation and then shedding as it does during a normal cycle and with sequential therapy. Start with low dose preparations and increase as necessary for symptom control.