Missed period!

My partner and I had intercourse the 10th of this February and I'm on the fourth day now of what usually is my period but it still hasn't came! Should I wait a little longer to see if I am preggers? Or go test now? Seems a little early to me but this would be my first child and I have no idea what signs to really look for. I haven't had any cramps like normal but my breast feel perkier if that makes sense and I haven't had an appetite. What do you ladies think?