I have a question and I hope to reseave lots of anwsers from anyone. when is the right time to take a pergo test? ive been tracking my preiod for a few months now and my period have been right on time, every 29 to 30 days on the dot. and im do for mine today and havent bleed at all. should I wait it out or take one. im very scared that if I take one now and its nagitive I'll end up getting my period.