Sex 2 days before period..?

So I had unprotected sex 2 days before my period is about to start. And now that the 2 days have passed I’m still not on my period. When do I take a pregnancy test since I had sex 2 days prior to my period. Do I have to wait a whole freakin month to test. My periods are every 35 days btw. So I’m wondering do I have to wait or can I rest sooner ..?