What is it?

Now I know about implantation bleeding but I just got over my period, so my question is, is it possible to have unprotected sex and still get your next period then have implantation bleeding? I had sex a few times in the beginning of January after my period (5th-9th) and got my period in the beginning of February (4th-9th) and today (2-16) I saw this when I wiped.