I don't know if im regular or irregular but I count 14 days after my period, had sex that day and I have to see my period on the 25 might be pregnant?

Can I be Pregnant? I am not sure how a 24 year old female would not know if her menses or regular on a predictable schedule or not. But, despite that surprise, anytime one is exposed to fresh sperm pregnancy is a possibility and thus if a period is delayed then and only then should a pregnancy test be done. Your expected period has not arrived, so no guessing allowed. If the period is late then please do a test.