How many days after a missed period do i take a pregnancy test?

i personally was skeptical about takin a pregnancy test to soon i was afraid of the outcome but, my best friend kept sayin your pregnant. My period had only been a week late so i to it anyways and surprisingly she was right after trying for a year it was finally time and were all excited. I am now 8 weeks pregnant. So if your trying and your scared i say go for it and good luck. !!!!!!!!!!