First time testing out trigger

Tara • 32• Married • Almost 3 years TTC • 6 IUIs • Roman James , July 7, 2019 💙 Baby #2 due May 2023 💚 through IVF 💉

Had my trigger on on 4/25 & IUI on 4/26. I decided to test the trigger

Top is 5dpt/4dpiui and bottom is 6dpt/5dpiui...

Shouldn’t it be getting lighter? It looks the same or actually a little darker to me!