Tildy,

creepy!!! I have a 26 day cycle and AF was due Friday too!! we are totally in sync!!
My only suggestion would be to try OPKs, they really helped me.. here's my chart 219525 Ovulation Charts. A blood test on day 21 of your cycle can tell you if you've ovulated and also if your progesterone is ok. I did one last year as part of infertility investigations.

Best of luck and here's hoping for a BFP!!! Then we'd have the same EDD!!!

Rozzie