Curious

Sabrina
So I'm 5weeks 5 days with my first pregnancy. Hcg levels have doubled this week; however I'm still having dark brown watery discharge still. I've been having it since 4 days before my missed period. I don't soak a pad and my cramps are very minimal. Has anyone else experienced this with a successful pregnancy??? My mind is going crazy. My first ultrasound will be Feb. 10.