Hi I Had Unprotected Sex, Though No Penetration, But Sperms

hi
I had unprotected sex, though no penetration, but sperms spill on side of virginal part or you can say above but outside genital area. I fear that both of our discharge diluted. Is there a chance of pregnancy. My periods delayed last month. I took Primolut. this month as well I took Primolut. very less bleeding. Should I fear Pregnancy