Hi i want to know if my girlfriend is pregnant

Patient: Hi i want to know if my girlfriend is pregnant because we’ve had protected and unprotected sex during the last week and it was both our first times and her period came just Friday and it was a one day period, it lasted until Friday night. She says it was normal, no heavy bleeding or anything, but that it was only one day. She isn’t feeling anything strange right now but I’m still worried. Please answer as soon as you can, thanks.

Doctor: