Going to take first pregnancy test...

Anna • 💕 Baby girl #1 born 2/26/2016 Baby girl #2 born 3/2/2019 💕
Hi everyone, this is my first time trying and my first time taking a pregnancy test
I bought First Response Early Results which allows you to test six days sooner. My period is due 6/13, one week from today (6/6). So with this test, is the earliest I should use it tomorrow 6/7 or Monday 6/8? I have overhead the instructions and confused myself. 
Also I do realize it's best to test after your period is expected, but I'm excited. Thank you in advance for helping me!!! :)