Thanks for the query.
Usually blood test
will get accurate result when compared with urine tests.
Sometimes urine test can give false positives.
But as both your urine test reports were postie, you better go for ultrasound
As it is almost 45days from your last menstrual periods, in case of presence of pregnancy, the gestational sac
along with fetal pole
can be visualized.
If ultrasound shows absence of sac, you can take tablets for withdrawal bleeding with your doctor's advice.