Think pregnant , to early to tell , unprotected sex HELP

So me and my boyfriend were having oral sex , his parents were home so it was difficult , we had no condom and we decided to have unprotected sex for about five minutes , he then said he was going to cum so with him on top of me by my belly I tossed him off and he cummed all over my stomach and my pubic bone (on top of the vagina) but no where near the entrance. It was right after my period we did this so I have to wait for ages to tell if I'm pregnant by pre cum or something? to see if I've missed a period. This happened 11 days ago and the only thing close to me noticing this is frequent urination and sore breasts