patch- free week?

ireland
so i started using the patch around two weeks ago (i just put on my third one) and i found this sticker pack in the box the patches come in and saw that it has a week 1,2,3 and free week sticker. i was confused what free week meant. i guess after my week is up with the third patch i go week without a patch and that's when my period should come? sounds reasonable but do i do that with every box every time? 

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