4dpo is way too early to be testing. This test is negative. Implantation takes place 6 to 12dpo, with the average being 9 to 12. Once implantation takes place, it takes 2 to 4 days for there to be enough hcg to register on the most sensitive test, first response early result. I would wait until you're closer to afs due date, before testing again, or until af is missed. Good luck hun !!
i cant see anything but that doesnt mean anything my first positive was very faint and i could see it but it didnt show on the pic i took. i would retest in a couple days