Had my last period July 28, (frst day) I had sex August 7th.. Condom broke & everything got inside of me. I took plan b one step 30/40 mins after it happened. I got a brownish discharge 9 days later and then it was like a normal period. My expected period was August 25th , but it didn't come. Was that my period of should i worry because i missed my expected one? I know that plan b makes it come early or later. Did it work? Also i don't feel any pain or anything as in pregnancy symptoms