Full of questions today

Amanda • I`m 24 literally married my best friend of almost 10 years May 9th 2015. He has 2 boys 6 and 2 we have been TTC our first baby since March2015. I thought this would be easy as pie, ha I sure was wrong
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?