Anyone get pregnant with “negative” opk??

This is my cd 16 opk and I had all the ovulation symptoms. I took this one at 11:30 pm and the next day I didn’t get to take one til 5:30 pm and it was lighter. Don’t know if I missed my surge or just didn’t get one. I took letrezole this cycle. My opks have started getting lighter since I got this opk two days ago.