So I should be entering fertile window.. But I'm not

PC • Mama to Cruz 💙 Kaia 💖 and Shaea to come 💗
I've taken 3 ovulation tests the last couple days to truly mark when I ovulate and all have been negative yet I am on the 2nd day of my window, says Glow. My temperature goes up and down or consistently stays at 97.2 but there is no trend good enough to view spikes in BBT. CM is neither here nor there.. Cycles average 34 days but can go all the way to 42 some months. This is so disheartening.. 2-3rd month TTC, and now Glows notification to me is that I have low fertility. Awesome. If stress pushes AF sometimes, is it strong enough to extend ovulation? Any advice other than with your head down, go tell your doctor?