Ovulation tests! No progression! CD16!

Hi all! I usually thought I ovulated on day 14-15 but first months TTC after 2nd trimester loss and decided to use tests to track! I’m new at this and have no idea what should be happening but I thought the line would be darker by now as I’m CD16! Any opinions welcome as I am confused! Maybe I ovulate later than I thought but I have EW mucus but not a positive test!