Ovulation Test Fustration

I have been using those Clearblue Ovulation kits for the past 3 days, and I am not getting an ovulation sign at all. I am so fustrated, I am afraid that they aren't doing what they are suppose to and I am ovulating an missing the window when I could be trying to get pregnant. I am praying I get a surge line and soon, if I don't get one this month I am going to be very upset with those test, because I know I should ovulate since I am on the Clomid. ARG!!!! I wish getting pregnant was easier.