Trigger line help

I knoooow this is ridiculous. I am 5dpiui and 7dpt. I wanted to test out the trigger because I like knowing when it’s out of my system. I also am very much aware that 5dpiui is way too early to get a positive test. I just wanted input on why my afternoon test on 5piui (bottom one) is darker than my last few. My morning one this morning was like so beyond faint, I wanted to call it negative. Any input on this? Is afternoon urine more concentrated? *again, I’m well aware that 5dpiui is too early and trigger testing isn’t for everyone but I like doing it.