Help please, so confused

So I started taking ovulation strips on the 19th October. I apparently am suppose to ovulate today (27th). I have took a test every day since. The top ovulation test is the one I took on the 19th all of the other tests have looked like the one below. Could it be that I actually ovulated on the 19th or is that negative? It’s just weird how the line is getting lighter each time when I would have thought it should be getting darker the closer I am getting to ovulation, or does it not work like that? If someone could help me out I’d really appreciate it :)