I am on CD28 today... I am due for AF either today or tomorrow.... I think I O'd about 14 days ago... I have been crampiy for 3 days now.. last night it was really bad during the night, uncomfortable enough to keep me up (and I have a high pain tolerance) my test was negative. So should I have a positive by now if I was PG? Should I take the Neg to heart and wait for AF to show up?