I had unprotected sex on the 12th of july,3 days after my last period, i took postinor 2, 1st pill less than an hour after intercourse and the 2nd pill 12hours later. I saw some type of brownish blood on the 19th when i wiped with a tissue, 7days after taking the pill. It lasted for 2days and my breasts started hurting and they still do. Should i be worried?..please help.thank you