7 days late, No sign of AFF....

According to glow, I am 7 days late for AF to arrive... I'm normally right on about a 28 day cycle and as of now I'm on cycle day 35 with no sign of AF. I did notice a tiny tiny little pink of pinkish discharge in my panties yesterday and I thought AF was coming but that is gone and now I'm worried. I do think I might of ovulated a couple days later than Glow predicted because I remember having some slight egg white discharge but I didn't log it so I can't remember the date. Is it possible im pregnant or am I over thinking it?