Could I be pregnant?

Hi everyone so I had unprotected sex on the 25th of May. My period is irregular so I never know exactly what date I get it. I ended up taking plan b, and I’ve been so stressed out about getting my period he did not finish in me though I made sure that we were careful I talked to him about using condoms from now on because I don’t want nothing happening that we aren’t ready for. Could I be pregnant I haven’t gotten my period yet, idk if it’s just a bunch of stress or something else…