When to test, fertile window ends today.

So this is my first month actively TTC, and I have "baby danced" every day, multiple times a day every day throughout my fertile window. Im so anxious because I really want to become pregnant. I might sound crazy but me and my fiance went out and bought the FRER already today to be prepared when I feel like I should test. But I'm not sure when! AF is due on the 16th, but Im so anxious I dont know if I can wait that long. Any advice on what day to test that gives the best % for a result?