late period- sex help

So me and my man had sex, not for long 
He then took his dick out and I finished him ( I gave him oral and he cummed)
So no cum went inside me and he did not cum before seeing me so no sperm in the pre cum! ( yes he could pre cum but doesn't mean it has sperm)
Should I be just fine?, I pray please.  I think my stress makes my period irregular. 
And my period is around 2-3 days late now and I think it's probably my stress and overthinking because I know my chances are low, I need some reassurance to make me feel better and finally get my period