Thanks for the query.
If you want to stop the pills in the middle of the month, you have to use some additional contraceptive
method till the completion of the month as you told.
And possibly you may get the withdrawal bleeding earlier.
But sometimes it is difficult to guess the time of onset of withdrawal bleeding because this can differ from cycle to cycle and person to person.
So if you are having at least 7 to 10 days gap for your vacation, you can stop the pills and wait for withdrawal bleeding.
If the gap is short, better to continue the tablets.
And after completion of the pack, if you want to avoid the withdrawal bleeding, continue the next pack without gap.
This will prevent withdrawal bleeding and also give contraceptive benefit.