Ok so im 13 days late for my period. My cycles vary by a few days, not this much though. Ive been having unprotected sex but im not showing any signs of being pregnant. Do I just keep waiting it out and see? Or should I take some tests soon? :/

I've never been pregnant before although I had tried for 4 years when I was married and it just never happened. Im at a loss of what to do right now. Help?