i'm scared... Options

[*xcaitlinx*]

well i was due for my period a few days ago and i'm scared that i might be pregnant. the last time my boyfriend and i had sex was on august 10, and we used protection [the condom didn't break or anything so there's no way that the semen got in]. yesterday we were fooling around and his penis was near my bare vagina but he said that there was no precum. for the past couple of days i've been doing tons of research about signs of pregnancy which has been making me even more worried and paranoid. my period used to be consistent and i wuold get it around the same time every month. however, for the past few months it's been irregular [i used to get it at the beginning of the month but now i get it at the middle of the month]. i'm not sure if the reason why it's late is because i'm stressing so much about it. i can't help it though...for the first time in my life i really want my period to come. i don't know what to do. i'd appreciate advice from anyone who has been in the same situation or knows anything about pregnancy.