14dpo implantation bleeding?

So I took a pregnancy test on 13dpo and it was negative. The next day (14dpo), I had some pink colored bleeding when I was wiping, and thinking it was my period, I put a tampon in. This was around noon. When I was getting ready for bed around 8:30, I took the tampon out and there was nothing on it. I put another one in for sleeping, but also, nothing on it when I took that out this morning. I've never had a period start like this.

Is it possible to have implantation bleeding at 14dpo? Has anyone ever experienced that here?