Help I'm freaking out!

So last night being New Years my and my boyfriend did stuff at his friends party. I'm not one to share the details but I'm freaking out that I might be in some way pregnant. We were in his friends room and we started making out and clothes came off. He kept his boxers on and my underwear were half on half off and he started fingering me. Then we started grinding by his penis only touched me through his and mine underwear and I'm afraid that I may be pregnant. I'm pretty sure that he didn't cum at all because he kept telling me I was going to give him "blue balls", but we did NOT have sex. We had to leave the party because the cops were called so nothing other than that happened, I guess you can say that I'm a very nervous and unsure person and I just need help... So please help me