Implantation bleeding?

Hey all,

Last week (Monday or Tuesday) my boyfriend and I had intercourse, he came inside me, and I took a plan B about 14 hours later. I’m not on birth control and haven’t been on it for about 4-5 months now. This would’ve been a week after my period. I took a pregnancy test last night, one of the digital clear blue tests that reads out pregnant or not pregnant, and it said not pregnant… but it says that it can tell you up to as early as one week into the pregnancy. Today I woke up and had very, very light pink spotting when I wiped. Nothing was leaking out of me and had I not looked I wouldn’t have known, but it was hardly even visible.

I was wondering if this could be implantation bleeding?