Implantation Bleeding: Fact or Fiction?

Dani
So...
Had my first period after coming off the mini-pill on August 19, and it lasted about a million days. Lol. Seriously though it lasted until about Sept 1. We had sex on Sept 2 and Sept 5. Today, Sept 9 I wiped and had some pink CM. I've had three kids and two miscarriages, so I'm no stranger to early pregnancy...but I've never had IB. Is it too early for that, or about right? Certainly it's too early for my period again, right?!? 😬