Are you also using some type of ovulation kit? Or just going based on what the computer tells you?
I am only asking because I am using the clear blue fertility monitor and after speaking to other women it seems within 3 months they get pregnant because the monitor lets you know your fertile days also your peak days when your about to ovulate. Many women are shocked that they ovulate early or later then the "typical 14th day" .
Best of luck to you