*update* Confirmed O, no AF, and BFN

Alie
Just wanted to update everyone who replied and was in the same situation... AF came this morning. Sad to be out but glad I actually ovulated and ready to start doing all my fertility testing this cycle. I gusss my LT phase is long...16 days. 
Ovulation was confirmed on 1/31 via ultrasound and AF was due yesterday (2/14).  Tested this morning and got a BFN. No sign of AF.  No cramps no spotting. Nada.  Think AF could be late even if I know I didnt have a late O? What's going on?!