If you take an at-home pregnancy test correctly and see a faint line, it either means you are pregnant or have recently been pregnant and miscarried. The best time to test for a pregnancy is the day you would expect your period to come.
Is a faint line still positive?
A faint line on a pregnancy test probably means that it's very early in your pregnancy. Even a faint positive pregnancy test indicates that you have some of the pregnancy hormone human Chorionic Gonadotropin (hCG) in your system.
Can a faint line be negative?
A very faint line may also occur if the urine is too diluted to detect hCG. Drinking a large amount of fluid can dilute the urine and skew the results. If a faint line becomes a negative test result the second time around, it could be the result of a very early miscarriage in the first few days and weeks of pregnancy.