Implantation Bleeding??

I'm currently 9dpo. We're on month 4 of TTC our third baby. But this is the first baby we have actively TTC. 
Today I went to the washroom and I had a slightly yellowish discharge with small red/pink streaks. It was a very little amount. And I honestly don't remember ever experiencing this before. 
When I went to the washroom again it was back to normal, and since then I haven't had any thing.
 I'm just curious if it sounds like implantation bleeding or something. Any help is greatly appreciated. 
I also should add that I am very regular, and I'm still 7-8 days from af.