Quick question - periods and norethisterone

[HetHet]

If you take norethisterone, does it reset your period clock as it were, so the period after that one follows your normal cycle, or does it mean that the period after that it will revert back to what it used to be?
Does that make sense?

ie if your period is on 6th of the month, and you delay it to the 13th of the month, does the next one come on the 6th or the 13th?

Also, can you only get norethisterone for a week, as I need to delay my period for at least 10 days.
Ta!

I just recently took this to delay whilst j was on holiday. I got my period 3 or 4 days after I stopped taking the pills so no, your body doesn't wait till your 'normal' time. I think a few days after stopping is normal/average.

I took only for a week but GP was very understanding so I'm sure 10 days wouldn't be a problem