Tmi post- pink discharge on AF day!

Anna • Married since 09/09. We have a beautiful son, born on 2/11/13 at 36 wks 3 days. Ttc#2 since June 2014. CP 10/19/14 :`(.
So I'm expecting AF today (or some day soon), after receiving BFN several days in a row. My cycle is typically 25 days only, I've been feeling mild dull cramps on and off, abdominal feels full, and all of a sudden I have pink discharge. I am hopeful that I'm not "out" this month....