Early period or….

For context, I’ve had consistent 29-31 day cycles for as long as I can remember. For the last year, I’ve confirmed my ovulation with the Inito monitor. This cycle I ovulated around cycle day 15 or 16. Currently cycle day 23. Woke up this morning with very light brown spotting with subsequent pink looking discharge. I’ve never bled outside of having my period. It’s only dpo 7 so I’m not sure even a FRER would be positive but curious to hear if this has happened to anyone else, whether it turned out to be a super early period or an early pregnancy sign. I don’t really have symptoms otherwise. After looking today I see that the phrase implantation b’ing really ruffles some feathers on Reddit lol but clearly it’s a real thing that happens, whether it’s caused by implantation itself or just so happens to occur during the window. Any insight or anecdote is appreciated :) and for those who track, my estrogen spiked this morning and pdg has been steady around 15-16