I found out I was pregnant at 3w4d ish and the test was faint that day and a couple days after. Got hcg level at 4w and it was 396 and then 48hours later it was 909. Then I took another cheap test just to see if it got darker. At 4w6d and it turned dark very quickly.! So I think baby is growing and progressing well. I am taking progesterone and baby aspirin per doctor.