PP period help! ftm

How do you know you had your first PP period? I'll be 6 weeks pp this Thursday. Around 4 weeks it seemed like my pp bleeding had stopped, then 3 days later I started to bleed again and it was literally just like a normal period to me except a little heavier. It lasted a week and even tapered off like a normal period. It's been 2 days since it's stopped and now it seems like I have normal cm. first period or still pp bleeding?