Huge tmi!!! Brown looking discharge?

So back story ... I've been pregnant before. Once with twins. Every pregnancy I've taken the plan b pill the next day after sex and I still end up pregnant. It's been a while since my last pregnancy and had an incident recently. So I took plan B the next day as well..... and 1 week later and I have this ?? Is this normal with plan B or ?? Theres no smell to it at all.