Question...

I took femara for the first time last week. Monday-Friday (CD 6-11) 5mg. I am now on CD14 and still haven't gotten a positive opk. Is this normal? I'm using clear blue with the smiley faces and the cheapie ones to track the line. Last night and today I have had weird pains down in my lower abdomen so I thought I was going to ovulate today but nothing yet. The lines also haven't been getting darker, I also feel like they've gotten lighter and that scares me. I'm getting an IUI the day after my positive and I'm scared the femara won't work and I won't get to do it this cycle 😔 Any advice? I've attached a pic of the tests. I'm also only doing opks this time, No ultrasounds.