Implantation bleeding after BFP

Has anyone ever experienced implantation bleeding after getting positive pregnancy test? I thought that implantation bleeding happed shortly after ovulation and read that most women don’t notice it— like 21% but that it’s more pink/brown rusty color. I didn’t have ANY previously but always check when I wipe and then got my POSITIVE test three days ago (4w2d) and just now had some pinkish/Brown discharge when I peed.

Sorry for the tmi and thanks.