Implanting?

Holly • Married to the love of my life and Mother of two, 7y and 9m. Taking life one step At a time. Breastfeeding Activist!🎌
Thursday night I had a little spot of brown discharge in my undies before bed, and Friday I have was spotting for about an hours it's brown discharge and a little spot of bright red blood. We also BD that day, before the red came. 
I am 9months EBF next Sunday, and due with AF on Thursday. Thoughts? 💭 what is the change of implantation bleeding? 
Oldest is 7 and you hest is 9m, never had or noticed implant ion bleeding before in any pregnacy. I am however symptomatic. 😅 save my brain from being over used!