Hi,thanks for query.Urine pregnancy
test kit available now a days are quite sensitive and can pick up pregnancy as early as one day after missed period.Faint lines on 2 occasions means there are less chances of pregnancy.Please look for other cause of missed period like any hormonal
or other pills,too much of stress etc.Still if you want to be 100% sure,you can go for ultrasound
after 2 weeks to missed period,the ultrasound must show gestational sac
inside the uterus by now.bye.