Wishful Thinking?

Katie

Best I can tell, I ovulated on CD 14 (no true positive on opk, but darkest line was on CD 13). Starting on 10 dpo I had some brown spotting, just when I wiped 10 dpo, and just in the morning of 11 and 12 dpo (today). My temps dropped on 11 dpo and rose slightly today. Is it just wishful thinking that this is implantation or is it more likely that AF is on her way?