Question? TMI

Sarah
I'm almost 7 weeks pregnant Monday well I've been on and off with brownish discharge is this normal. I have been to the er for bleeding and this problem and it's to early to see anything in the sac and know if there anything wrong? What should I? I don't want to stress and don't want to feel afraid because I had a miscarriage about 2 months ago to twins :"( help me?