Late and need some advice!!!

I'm a week late, and have no symptoms of getting my period anytime soon.
I generally have a regular cycle and i'm really fretting now.
I've had sex over the past month with my boyfriend, we used a condom everytime but no other form of contraceptives.
I don't think the condoms split at any time but i know they're not completely effective.
I know the logical thing to do is get a pregnancy test to see but i'm too afraid of what the outcome will be.
Is it normal to be this late when i usually have a regular enough cycle? Please tell me i'll get my period soon and i'm worrying for no apparent reason!! I'm only 18 and don't know what i'll do if i am pregnant!