Help with ovulation tests

I'm starting to worry. This is our second month ttc and I'm supposed to be in my fertile window... Three days in and I've been taking clear blue ovulation tests the digital ones that tell you when your four most fertile days and I've had negative every day so far.. Is that normal this far in? ive had an app on my phone that has tracked my periods for the last two years and is sometimes two days off at the most which would push my ovulating back to a couple days but would it still show up positive by now??

im still slightly clueless with these ovulation tests so any stories or information would be appreciated! Thanks!