Has this happened to you?

My last "period" was May 27 it was brown discharge the next few days was light pink then back to brown discharge. No heavy bleeding was that my period or implantation? Glow says my peak is today so I'm going to dtd😍 btw I tested that weekend while in my "period" but negative. If it was implantation would it have shown? I'm gonna wait it out to see if I really start this month. And does my boobs have to hurt??