Brown discharge and pregnant

Ok....I have mixed signals. My app has me estimated 5 weeks and 2 days pregnant. I've had light brown discharge for about 4 or 5 days now. My Ob nurse said as long as its not heavy and red, its ok. Some others have also said "its brown. Don't worry unless ifs heaby and red"

But what if it looks like this???

This is what I have a little of today. Anyone else?