implantation or period?

I'm supposed to start AF on the 3rd. Yesterday the 31st, 9dpo, I had very light pink bleeding, Only lasted a few hours. Today the 1st, 10dpo, i started having light brown bleeding and then has gotten darker as the day has gone on. No need for pad. Just not exactly sure what this is. Any help is appreciated! 
I've googled and everything just keeps saying implantation bleeding, but just would like to see if anyone has dealt with this!