Losing hope

Natalie • Married 11/14/15. 4 children. Mom of twins.
I am 6 weeks and 4 days today. Started with brown discharge yesterday and today I have been bleeding consistently, but not super heavy. Some cramping, but nothing too terribly painful. Changing my panty liner once every four hours or so. I asked my doctor and he just said that it could be perfectly normal but that the chance of miscarriage does exist. That basically I have to wait for my next appt March 8 to see what's going on. I'm an overthinker by nature. Speaking to him only made things worse. What should I do? I have been praying and praying. My husband and I love this baby so much already. I just want to know that the baby is still doing okay. We had an ultrasound 3 days ago and there was fetal cardiac activity present and we confirmed that this is not a tubal pregnancy. Anybody had similar scares? What did you do? Can you all pray for us and our baby?