Ovulation Tests: Is it just me?

All right, 34, ttc 13 mos; mc back in Feb at 5w5d. My cycles are super regular; 26-28 days. I bbt and always have a spike and dip. But I have never had a positive opk. So while Glow says today is 26.6% (my highest) and Ovia gives today a 9/10 for fertility, I am not getting even a faint second line. I am bding anyway for the next...forever, but was wondering if anyone else has run in to this.