Implantation or early af?

Tiffani
I am currently 8dpo. I have had very very minimum, almost non existent, spotting for for the past two days (very light, just discoloration really) and then today after using the restroom there was significant spotting (pink with some clear mucus) and then some brown spotting when I went to the bathroom a couple hours later. It is not enough to be in my underwear, just noticeable when I wipe. At first I thought I was starting my period SUPER early (which never happens, 27-30 day cycles.) but it hasnt picked up so I am unsure. 
Other than increased appetite, cramping around 4/5dpo and irritability, I am not having any symptoms. 
Could it be implantation and be brownish?
Advice please!!