When you use combination pills (21 pills every 4 weeks) you can finish the package and continue with the next package, skipping the pill-free week. So you take two packages in a row without having a period. (With 3-phase pills you go on with the pills at the end of the package, the last colour).
Another possibility is to stop taking pills, waiting a week in which you have your period and then starting a new package. Don’t make the pill free period longer than 7 days!
In both cases you don't have to take the morning-after pill.