For what it's worth (about 30sec of my time to type this), I agree with you: not all pills are the same, and it sounds like what you did is what you're supposed to have done. (the ones I'm on now (Cilest) consider it a "missed pill" if I'm late by more than 12 hours, but say I don't need a backup during my week of placebo. The previous brand (Ortho) called it a missed pill only after 24 hours).

But meanwhile, go ahead and call the pharmacy-- you may have ovulated during your placebo week or the day or two after.