Implantation? No pic

Serena • Soon to be first time mom. Trying for our little "Caramel Macchiato" Harris. TTC#1
So I started a light bleeding and it had a lot of cm went to pee again and it's barely there and it was. My AF is due 4/2. I'm 13DPO is that too late for implantation or is it the start of AF?