Full of questions today

I thought implanting was done right after ovulating. Which is roughly 2 weeks before af, why do people ask if "this bleeding" is implanting bleeding or af bleeding? A bit confused. I only ask because im 3 days past and had absolutely no site of blood until today twice (8am and 6pm) i have very light pinkish when i wiped those 2 times and nothing else. Is this af or implanting?