I have been tracking my cycle for the past year, and they have been fairly consistent. My ovulation typically occurs around days 18-21 of my cycle.  This has been confirmed by ovulation kits as well as my doctor during previous cycles. Last month was my first <a href="https://glowing.com/glow-fertility-program">IUI</a> (same sex couple-no known fertility issues). Today is day 21 of my cycle and I haven't even surged yet! I am using clear blue digital ovulation kits and while I know you aren't supposed to go by the lines inside the strip, they usually look identical when I surge. The strips looked pretty close to me yesterday, but still no positive. This morning, negative again and the strip looks fainter! I am stressing that I missed ovulation, even though I test like a mad woman! Any clue what could be going on?