Confusing faint line on one bfn on another!?

Hello!! I took a test this morning and saw a very faint line which was quite shocking cos I've never had any lines on the tests I've taken!! And now I see one! But then I took a clear blue digital one and it said not pregnant, this was obviously not the first pee of the day but the second! not sure if that makes a huge difference! Docs said I should try again in a week and by looking at it she's doesn't think i am pregnant,even tho she could see the line. What do u guys think?? X