Hey Emma, your line will get darker dont worry!! I did my first HPT at 10dpo and the second line was faint and then did again at 11dpo and thought it would be realllly dark, but it wasnt, it was only slightly darker. By the time I got to my 4th hpt it was dark enough for me to be satisfied that I was pregnant! And that was on 14dpo.. if you check out bub's website.. you will see how dark my line had gotten