Late...Not Hopeful

AF according to Glow, should have come six days ago. I tested two days after missing, BFN
I had brown discharge/mucus with small amounts of blood for 4 days. 
I went to my OBGYN who tested me Fri- BFN. She told me that weirdness could have been a period, but if AF doesn't arrive in a week, to test again. 
I'm trying to not be hopeful so I don't psychologically "notice" symptoms. Or get very disappointed that I missed my AF and my calendar is off.
Has anyone here had a weird cycle like I have this week?