TMI * TMI opinions please πŸ™πŸ»πŸ™πŸ»πŸ™πŸ» going crazy!

Hi ladies I had this bleed on cycle day 27. It's been 4 days now & ive had NO other bleeding just this spotting on one day. I wore a panty liner & nothing. I'm due my period on 26th September. What could this be? My period?!?!? Implantation bleed?!?!?Β