Spotting help?

On cycle day 24 I started to have some dark pink spotting, only on the tissue when wiping, I put a pad in just incase it was my period and it’s now cycle day 26 and I’m still having the same thing but it’s extremely light when I wipe only and it looks like this like a pinkish/brown colour? What could this mean? Because as far as I knew I hadn’t even ovulated yet all my opks have been negative, could this be my period trying to start or could I have ovulated and it been implantation bleeding? Never had this before