I have had some unprotected sex lately and with in 9 days I have taken plan b twice (on the 9th and on the 17th). I am on birth control but I have forgotten to take it a couple of nights ( I take it at 8pm, if I forget I take it in the morning). I have forgotten to take my pills a couple of days before I had unprotected sex but always ended up taking them the next day, I've never gone 24 hours without it. I took plan b one day after the first time and two days after the second time. I haven't started my period, but, my period has always been erratic. Now I have brown discharge could that mean my period is coming?