Hi There.I Had Sex On 9th December.It Wasn't Unprotected. We

Hi there.I had sex on 9th December.It wasn't unprotected. We used condom but when he came and after that the condom was empty. And everything was inside me.I took Levenolle one step one hour after that.4 days later I started bleeding but is not my like my usual period.It's like a dark brown discharge.Today I am still bleeding it's the 8 day.My last period was from 29 th till 5th of December and is usually 6-7 days. Is that bleeding normal?