I took Plan B a few weeks ago, and got my period five days after. I had to take it again a few days ago because of a mishap, and I haven't gotten my period. It was taken twice within a month. Is it normal to not get my period if the last time I took it, I got it a few days after taking it? If I got it then, am I still going to get my period at the original scheduled time, or could it be late because I got it early from plan B the first time I took it?