Implantation or period?

I got this blood today, 2 days before my period was set to start. I took plan b 2 weeks ago but was close to ovulation. Do y’all think this is period blood or implantation? I’ll see if it gets heavier today but so far it hasn’t. I’m so scared! (Sorry for the gross pics btw🤮)

Btw, the blood in the second pic wasn’t as bright in person as it appears, more of a darker red