ANY time you have unprotected intercourse whether You climax or even if he doesn't climax is a risk for pregnancy. Pre ejaculate has live sperm in it and that can impregnate you let alone if he has a full blown ejaculation inside of you. So, yes. You most definitely could be pregnant. Let us know if you get your period next time it is due!
Are you saying you had unprotected sex? Because if you didn't use a condom and you aren't on any other type of birth control then there is a chance you could be pregnant