Question please help ASAP

So unprotected  sex happened on Tuesday - but he pulled out. ( not knowing if he had ejaculated or not) I was due in today and havnt experience why sign of coming on my period. I have experienced acne something I normally get before/during my period. I was wondering if the late Period was something to be worried about (am I pregnant) I would also like to say it was my first time so is it worry ? 😁I was wondering if any one could give me advice or the heads up if I am pregnant or not thank you xxx