My period is sometimes late, but never this late. I haven't had any unprotected sex but a small amount of precum may have gotten on me a few weeks ago. I have also had cramps for over a week now.

Suggestion... be very brave and take a pregnancy test again next week that is if your periods will not have come!!

So I am guessing you had protected sex?

If all you were using is a condom they have @ a 10 percent failure rate, and it is not uncommon to become pregnant using just condoms. Even using birth control pills and condoms you can still get pregnant

So if you are expecting never to get pregnant using protection you are incorrect.