I know it's probably a very small difference but is Lutera effective as soon as I take my seventh pill? Or if I take the seventh pill on the morning of the seventh day, will it be effective by 8pm that night? I realize this is a silly question but I just want to be totally sure.

Also I started on Sunday (the 22nd) and my last period started the 3rd. My doctor said it would be effective after seven days but I didn't think of this question until now and I would just like to clarify.