Need advice!!

Okay! So I need some advice. My last period was on 08/07/2016 and lasted normal 6 days. Well on 27/07/2016 I started having some pink spotting, which got 'heavier' for 1 day. And then continued spotting pink blood and then brown for 2 1/2 days after. Af is due on 05/08/2016. Or was the light bleeding spotting my period? Or what?! Anyone have any idea? Was that implantation? Or early af?!