help!!!

I was supposed to get my period today but didn’t which I’m not worried about since I haven’t been sexually active until today. Also my periods don’t always exactly happen at the same time. TMI but today my boyfriend put the tip of his dick in and it didn’t go in all the way, there was no protection used. Is it possible I can be pregnant ? I know how easy it is to get pregnant and I’m freaking out, help?? If I don’t get my period by the next 3 days could I be pregnant ?