I'm not doing anything differently with this cycle, but FF also never gave me CH ... maybe I didn't O? I adjusted this month to go by OPK because not seeing the DPO was annoying me. I don't know why they didn't give me CH. My only guess is because my first half temps were so wonky. I feel like I O'd, though ... I got a super positive OPK and the next day my temp was 97.60 which is the same temp for O the previous two months ...

I didn't do Progesterone last month or this month ...

And I do have a cold, but I haven't had a fever, so I assume that's not a factor.

Another friend suggested perhaps implantation dip. It was a rather steep drop and no bleeding so far. We'll see.