I know it doesn't feel real 
as far as I know (it was all a blur when they explained!) they will see if they can break my waters, if they can they will do that straight away, if not tey will use the pessary and wait 6 hours and if that doesn't work they will wait until the next day and see what to do next.
They are hoping as it's my second it will work quite well. Will keep you all updated!