CD41, BFN NO AF

Am I out? I am 7 days late. My friend who is a nurse says it's still too soon. Some women get their BFP really late. It depends on the womans body. I have brown discharge when I wipe. Its inconsistent. Sometimes it's a lot and sometimes it's a little. If AF doesn't show in 7 days, I guess it's all on the blood test. Who knows...