pregnant?!?!?

Sooo I had sex like 5 or 6ish weeks ago (it was my first time) we used condoms and I got my period three days after I believe and now I was supposed to get my period yesterday but still nothing and I've kinda been freakin out all month because my first period after sex was like light for me and I'm freaking out Because I don't wanna tell anyone and I'd have to tell someone to get a test what should I do?!