please help!

Kayla

i ovulated on feb 4th according to my <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">period app</a>. my cycles are irregular. 32-40 i have been taking tests 3 days from expected period and negative. today, on day of expected period the first response was negative. today is exactly 2 weeks from when we had sex. should i accept that the tests are honest and negative?