Implantation bleeding?

Have any of you ever actually experienced implantation bleeding? I didn’t with my first pregnancy, but I’m currently 7or 8 DPO (I had what I thought were 2 days of peaks on my OPKs). I just went to the bathroom and had some light pink spotting. I think it’s just my period starting early, which would explain this crazy headache I’ve had for 2 days now.

I was just curious if you actually experienced implantation bleeding about how long before your missed period/BFP you experienced it.