I took plan b one step & i cant tell if this is my period? Help?

Me&my bf did it on the 8th of wensday but the condom broke. I took plan b one step on the 9th which was a thursday. I then got brown spotin on the 15th(Wens) The next day blood. But today is Sat. & nothin is comin out? Is it still my period or not? Help?