please help me!

my period is 4 days late and I had sex on the 12. I'm not showing any signs of pregnancy that aren't the same as my pms. I gave him oral and he finished inside my mouth and then after a few minutes he put it in me. we used a condom halfway through that and I don't know if I'm pregnant or not. it's been exactly 2 weeks since then but later that week we went through a horrible breakup... that was a lot of stress so could it be late because of that?