I am trying to conceive for last two years. I have irregular period. This cycle, I took Letrezol for five days. On July 03,2014, I had ovulation bleeding for four days, Ovulation was monitored by ultrasound and blood test. Took Duphaston for ten days and on July 18, 2014 I got BFN and stopped the Duphaston. Today is July 25 and still I don t have my period. If I ovulated shouldn t I get my period after 12-16 days? it s 20 days past now. Could it be that I didn t ovulate even with the ultrasound and blood test ? plse advice