Help me pls understand

Hi ladies , i been ttc for couple of years

And now decided to aproach it seriously ( i know i m ovulating, Dr confired that few times at her office ) i started usung ovulation tests this past 3 months , and they are very confusing . I m going to post a pictures of my cycle and my 3 recent ovulation test taken each day ( before that was barely visible line . So instead of getting darker today its kind of lighter than yestarday 🥺 and past 3 months the same . What is that ? ( tests from left to right )