Early pregnancy testing

I know technically the box in small print tells u from day of expected period on are best results....but I think they shouldn't try to sell us tests that advertise 5-7days sooner cuz it's usually bs! Then it gets u all discouraged and I have four more days or so til AF is due and now I'm all miserable cuz my "early detection" test said not pregnant already. :( just needed to vent.