Hi Loula, I stopped my mini pill in November 2015. I had a bit of spotting few days afterwards and then my first proper period on 6th March. I'm CD 25 today and still don't really know when my period is due, but I'm being an optimist and guessing (hoping) at an average 28 days - it may not be though. I was on the mini pill for a total of 8 months.
They say it can take up to a year for your periods to regulate but people have fallen pregnant straight away after the pill. I guess it just depends on the person.
Good luck for when you do decide to TTC XX