Plan b and heavy bleeding


Hey ladies , I took plan b around 6 days ago and I took it the day of the accident. It was during my fertile window . Am i okay?? Well last night I had some brown spotting when I wiped . This morning I woke up and it’s like my period!! Heavy but a brown color?? Does this mean it’s my period or just the pill messing up with my cycle or is it withdrawl bleed ? PLEASE HELP!!!!!