i had sex April 11, took plan b a hour after sex. I got a very light period(pinkish/red) april 29 and it lasted 5days. It is may 31st and last night I expierienced brown discharge. Now when I wipe, I spot brown on my toilet paper. I have no PMS symptoms... Am I pregnant? Before my period was due I took 3 pregnancy tests. All were negative. But I'm still scared I maybe pregnant...