Question about implantation bleeding

My last period start was April 1, I have a relatively short cycle at around 24 days.

Last Tuesday (4 days before expected period) I had a positive pregnancy test, followed by a few others the next few days.

Fast forward today, I’ve had some spotting, ever so light and it was light light brown/palest pink, really hard to see unless you’re looking for it (which I always am given my history of losses).

This isn’t implantation bleeding, right? Cause that would have happened a week ago before I got a positive?