Am I doing this wrong? Clearblue Digital/Cheapies

Hey there all. My husband and I have been TTC for about six months thus far with no luck. However, I came off oral birth control at the end of November.

I’ve been using clear blue digital smiley tests and the cheapies as well. The tests have worked for me thus far but I’m wondering did I mess up this month/could I have been early or is it possible I still haven’t ovulated?

I use Flo app as well for some guidance and I know that isn’t perfect but per Flo I should have ovulated on Thursday the 3rd.

However, I started testing on CD 16 (Monday) and I’ve had blank circles since with negative OPK’s as well. I always test in the morning when I wake up.

I’m currently on CD 21. Tested this morning and still blank circle, negative OPK.

I will say my cycles have slowly evened out. My initial period back when I stopped birth control took about 40 days. Each month a day or two comes off and I believe my last cycle was 32 days long.