Help Please! (Pic)

Here is a pic of my monthly log for October. The hearts show the days I had sex in relation to my fertile cycle. I just went to the bathroom and had a clear discharge with a little pink and brown, but it wasn't like I was full-on spotting. (Not sure if that makes sense...) I am supposed to get my period next week. I am on the pill. I'm not sure if the discharge I had was implantation bleeding or not?? What do you think?