The time interval and dose in which you took your emergency pill was perfect. It is the only way you can avoid pregnancy
after a condom break or any unprotected intercourse
So after this, you just have to wait for your periods. They can prevent 90% of the unwanted pregnancies.
Testing yourself now, would be definitely early if you do urine test for pregnancy. Urine test for pregnancy come positive only after 2 weeks of ovulation which is around the first day of missed period.
A blood test
to detect pregnancy comes positive early by around 1 week after ovulation which is 21st day of your present cycle. SO if you want you can check for blood beta hcg
This would hardly make any difference in the step you take in case you turn out positive either by doing blood test early or wait for urine test to be valid. In both cases abortion
is done using the same procedure.