I had sex the last day of my period (no blood) which was June 27, he came (I know very irresponsible of both of us without using condom and me not being in the pill) but 1-2 hours later that same day I took the plan b pill. And then on July 3 I started to have brown spotting and light cramping, the next day it was blood (no brown or light pink either) this ended on July 6. I have an app that says when my next period will come which is supposed to be on July 20. I am 8 days late... did the plan b make me miss my period or am I just not gonna get it for the month of July until next month??? Please help!