Spotting/period after plan b

flor

I'm so confused and scared at the same time, as you can see I've been spotting now. Which is I got my period twice this month is it because of plan b? I just took it aug.13 1 day before my ovulation day and then now I'm spotting and having some cramps like it's just my period. Does it mean next month I will not have my period or it will be delay?