I am 18 years old, and have currently missed my period.
My period was due on November 26th 2008. It is now December 2nd and no period. I took a home test on November 28th and it was negative. I haven't been worrying until today really. I have had no cramping, just slight pressure in my lower abdomen.
When I had sex with my boyfriend we used the pull out method as always, nothing but possible precum got in me.
I missed my period in the month of July, but it was normal in August, September, and October.

I don't know if I'm pregnant, or why I missed my period and 6 days late.
What should I do? Could I be pregnant?

Try taking the test again now that it's several days past your start date. You might want to see your doctor as well to make sure there are no medical problems causing you to miss periods. While you're there get started on birth control if you truly don't want to get pregnant. There's a term for people who use the pull-out method---they're called "parents". Precum can get you pregnant, stop playing with fire if you're not ready to be a mom. Boyfriend doesn't want to use a condom? Then he doesn't respect you enough to deserve having you. Condoms are no guarantee against pregnancy either, they can break at the worst time.

If you're serious about having sex but not having kids you need to be serious about your birth control. Stand up for yourself and find a man who can respect that you're the one who ends up pregnant so you call the shots.

Good luck to you. You're a strong, beautiful young woman who is in control of her own destiny.
Ber

Well, if you missed your period in the month of July... maybe it is happening again.

Just take another test. Use your first morning urine. If your period never comes and you still get negative tests, then you should see a doctor.