how soon & what brand!?

We have a son who just turned one. He was our welcomed oops baby. We are now in a place that we can try for another, and so we did. I am extremely happy and excited, I don't know if I can wait 16 more days to test (thats when I am supposed to get my period). How soon can I test? and which brand is the best for early testing?!!? please let me know! I'm so excited, it's the best feeling.