Weird period

Okay ladies I need some help so I always have my period on time never fails I teach that shit with a calendar and everything anyways the last few days was my fertility week but I’ve been cramping like crazy and spotting here and there not a full murder scene yet but it’s just light pinkish reddish spotting should I take a pregnancy test or wait on it and see if I fully start my period on the so called date I’m supposed to start 😢😫 HEEEEELP!!!!