AF showed her face last month from the 12th -15th my fertile window was between the 21st- 27th I BD 23rd 24th 26th and the 28th. AF was due to show her face yesterday I usually get it the night before or early that morning but no sign of AF yesterday so I took a hpt and got a BFN she still hasn't shown, I usually have sex the day before so AF could show I had sex twice and she still hasn't shown!! WHAT SHOULD I DO??? Has anyone had this happen before if so what was the outcome?