A pregnancy test with a faint line is considered positive and that you are pregnant. It is possible that the faint line is just because the urine pregnancy strip you are using is outdated or of inferior quality. But the most likely explanation is that you are early In your pregnancy and the beta HCG (component measured in urine pregnancy test) level is not high enough to show a positive test.
I would recommend the following things-
1)Get a re-test of the urine pregnancy test after a week which might give you a better idea about the state of pregnancy.
2)A better method to detect pregnancy is a digital pregnancy test meter which has better sensitivity to detect pregnancy.
3)Consult your GP or a gynecologist who might give you a better idea of whether you are pregnant.
4)Your gynecologist might also perform a Tran’s vaginal ultrasonography to detect early pregnancy.
5)Eat a good balanced diet with good portion of proteins carbohydrates and vitamins. Consume diet rich in green leafy vegetables and milk.