Too early to test?

The last time I had sex was during my fertile window of course since I am trying to concieve my first child. Yesterday was the last day of my fertile window. My period is supposed to come in two weeks, but I am super eager to find out if I am pregnant or not. What do y'all think? Should I wait till my period is a few weeks late? Or is it okay to take a pregnancy test before your missed period? If so, how early? I'm just really excited! Help?