Pregnancy test

So I've taken two now. I had unprotected sex but he don't cum inside me but I still know there's a possibility. He pulled out. But currently my period is 3 weeks late and I took my first test in the afternoon when I wa 2 weeks late and  it said negative. I took another one this morning at 3 weeks late and it was negative again. It's just really annoying because well...where the hell is my period!!!!