WTF?!?!?!? i have a 28 day cycle. last month i got a positive opk at cd19. LP was only 8 days so decided to do daily opk once AF had disappeared. urine HPT BFN this am. any once have any odea whats going on? can u ovulate at different times each cycle? i thought i was screwed ovulating so late.... but now too early!! please help!!