Clear blue advance ovulation tests

Has anyone taken these clear blue tests and only got high fertility results but never a peak? I've been taking them for a week now with mostly just high fertility results but not peak day. I only took them once a day in the morning. I'm wondering if I have just completely missed my o day by not testing twice a day. I'm on cycle day 19 already and no positive peak day, just high fertility days. I'm also afraid that I just didn't ovulate, but could that be possible with so many high fertility days?