Does this mean the plan B worked ?

So I took PlanB about 4 or 5 Days ago, i’m now bleeding like a normal period, not spotting. Like an actual amount of blood (heavy ish flow like usual) when i went to wipe the toilet paper was like covered in blood from my vagina. My period isn’t due for another week and a half (i know plan B can make your periods come early) I just wanted to know if this met it worked and I am indeed not pregnant.