Faint lines 4w 2d

Abbie

Has anyone ever had very faint lines even at 4 weeks and 2 days even though the lines are getting darker it's still very faint however I did get a positive via Digital Pregnancy Test hotstar the photos of the line progression you can see that the faint lines are getting darker I just figured by 4 weeks and 2 days they would be in your face dark. Oh and by the way they are darker in person than what they look on the photo. I have a doctor's appointment on the 17th. I have had chemical pregnancies but not one where I have actually gotten a positive on a digital and not one where AF never showed should I be concerned or should I just keep being patient since the lines are getting darker?