8 days late and pink discharge.

I am currently 8 days late when I normally have a very regular period, my glow predictions are never wrong! 
I had a slight pink discharge on Saturday but it went away and today when I wiped I saw the tiniest thing of blood, I mean the SMALLEST ever. Smaller than a pin point, tiny tiny. 
I have no symptoms of anything other than being exhausted. Should I test or  do you think AF is on her way?