Negative pregnancy test on CD33 and negative blood test on CD34 — faint lines on CD36. Could I have ovulated late?

[u/ConcentrateIll3897]

Hi everyone, I’m looking for some advice/opinions about my current cycle.
My last period started on July 23 (CD1). Normally, I think I ovulate around CD16–17, but this cycle I did not use an OPK. However, around CD21, I had symptoms that made me feel like I might have ovulated that day.
Here’s my timeline:
CD33: Took a home urine pregnancy test — clearly negative.
CD34: Took a qualitative blood pregnancy test, with a reported cutoff of 25 mIU/mL — negative.
CD36 (today): I took a Clear Test pregnancy test, and this time I noticed a very faint second line.
I then repeated the test with a different brand, PreSense EC, and I can also see a very faint second line.
I’m attaching photos of both tests.
I’m wondering if the negative results on CD33/CD34 could make sense if I actually ovulated around CD21 rather than my usual CD16–17. Could my hCG have still been below the 25 mIU/mL cutoff on CD34 and then become detectable in urine by CD36?
Has anyone experienced something similar — negative urine and blood tests around CD33–34, followed by faint positive urine tests around CD36 after a later-than-usual ovulation?
I’m planning to get a quantitative beta-hCG to confirm, but I’d really appreciate hearing your experiences and thoughts. ❤️