Please help..

My boyfriend and I had sex with a condom on. The condom did not break nor slip. He only wen in and out of me for a few minutes. There was no ejaculation while having sex. The condom was on from start to finish. I am not on a birth control, however, we did use a condom and there was no ejaculation. What are my chances of pregnancy? Sorry I am just freaking out and need some insight to ease my worrying. Thank you in advance.