What Does This Mean?

So my last period was from July 8-14th. I’m pretty sure I ovulated around the 21st or 22nd. Me and my partner are very sexually active, and have had unprotected sex consistently since that period ended (Not trying but not preventing either). My period for this month was supposed to start between the 3rd-4th and last until today. Around the 29th I started the regular cramping, breaking out, soreness of breast that comes when my period is about to start. 8/3 comes and I start spotting this brown discharge which sometimes happens when my flow is starting up except this time around that flow never really came? I’ve been spotting this brown discharge on and off since then. Cramping has been on and off, even my breast sensitivity has been sometimey. Is it time to take a test or is this just a wonky period? I don’t want to waste one, but I’ve never experienced this before and I need someone’s input.