If your periods are missed for 21 days it corresponds to 7 weeks of pregnancy
Next Steps
At 7 weeks pregnancy even night urine will show positive
Health Tips
Just to be double sure and rule out late implantation you can check again with morning sample urine tomorrow.
If negative start Tablet Meprate 10 mg twice a day for 5 days. You will get your periods after you stop taking the Meprate after 7 days.