when's the best time to take a pregnancy test??

I took mine 10 days after and I bought a few pregnancy test at Walgreens and they where all negative or blank. Then like maybe 2-3 days later I want to a clinic n was positive your best bet is going to a clinic after 2 weeks. or the most obvious would be after you miss your period bit give it some time. Because sometimes us stressing over the thought of "i'm pregnant" can cause you to be late. good luck :) Also my friend who worked at planned parenthood also told me to take it 10 days after we had sex