1st IUI please share your feedback, support needed..

My first <a href="https://glowing.com/glow-fertility-program">IUI</a> and I have tested 2days/ 4days/ 6days poste <a href="https://glowing.com/glow-fertility-program">IUI</a>, the last test is done 8 days post trigger shot and I feel like the last test(last one down) is a bit darker thank the one in the middle which is 2 days ago.

Pls have a look and share your feedback if you feel like the last test is darker than the one in the middle or its just my imagination, I also know that its still early..