Think I'm out this round :(

Erin
Cd 31 of very normal 28 day cycle.. Ovulated on cd 18, which was really weird for me .. Temps stayed up until yesterday ... It went from 36.8 to 36.61 now this morning 36.46 that can't be a good sign right ? 
​No signs of AF but all hpt bfn ..  I even took a frer yesterday ( day of missed AF. ) and it was bfn 
​I didn't bother testing this morning as I assume AF is just being a b$#*% and playing games 
​Anyone test the day AF was with bfn and turned into bfp. ?