Did I miss it?!

AF visit was between 04/23-04/25 (shorter than usual), so per my OT instructions, I started OT tests last Friday 05/02/14, but last week BOTH lines were darker, and now the 'Test' line is getting lighter instead.  Did I miss my ovulation despite starting OT testing when recommended?!? 
​Anyone else have this issue?  If so, what was the result?  Did you get your period as expected or even earlier or later or were you pregnant?