Plan b spotting? Or implantation? HELP!

Courtney

My husband and I had sex the night of 10/20 we used a condom but he got soft before he pulled out and the condom stayed in… I used plan b the next day. I had a super super light almost spotting flow from 11/6-11/10. I took a test 11/11 and it was negative but I’m not sure if that was enough time? Was this a period or implantation? I definitely don’t want to be pregnant. Help! 😭