Confused...?!?

I started ovulation testing with a kit last week about two days after my period. The test line was actually darker than I expected at that time, and now the test line seems to be fading away in color the closer I get to my ovulation day. I’m supposed to ovulate in two days, and the color is almost non-existent for today.

Anyone else have this happen? Is this normal? I wouldn’t be missing my window within 2-3 days after my period, would I?!?