Is the ratio taken on the second day of taking the tablets from the new Ativia blister secured?

Hi I finished the first pack of Atiwia (on Monday the first day of bleeding I started to use them) then after finishing I took the recommended 7-day break and started the next pack the following Monday. On Tuesday evening (it was already after taking Monday and Tuesday tablets from the new packaging) I had an unprotected additional ratio. Is the effectiveness of the tablets maintained all the time and that this ratio was already secured on the second day of the new packaging? Thank you in advance for your help