Super nervous of pregnancy

I know it's stupid but my boyfriend and I have unprotected sex literally all the time almost whey day it feels like. I have always been able to rely on him to pull out but I feel like maybe the last few times have been cutting it close and I have found cum close to my vagina but It has never one inside at least from what I have noticed.  My period is supposed to be coming any day now I got the one symptoms but now I feel like I'm getting over them even though my period hasn't even come yet.  I have only just turned 17 so in scared to be pregnant.  I mean I highly doubt I'm pregnant but I'm still worried.  Idek I'm not even really asking anything here I'm just nervous.