Implantation Or AF?

re

I spotted a TINY wipe of pink blood yesterday at 7DPO. Had cramps but super mild.

Today at 8DPO, my cramps are worse and I got a small bit of brown blood in my underwear (less than a 1/2 teaspoon)

I’m 6 days to AF- never spot this soon. Is this more likely to be implantation or the witch coming early?

Comments appreciated!