Tried this new test from clear blue Digital that is suppose to detect your two most fertile days. My fertile days were 18th-24th with the 23rd being my most fertile day according to my <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">period app</a>. I used the test every morning from the 20th to the 23rd and got no results. I stopped testing. Do you think I ovulated early? Or even later? Has anyone tested with these?