I had my last period on Oct. 20 to 26, 2011.
Me and my boyfriend had a sex on Oct. 25, 2011.
He wore his condom and we didn't even finished our intercourse.
It just took for 3 minutes I guess.
Then, we had sex again on oct. 29 and oct 30. He wore condom again and use also the withdrawal method. So I have no doubt that I might became pregnant because he checked his condoms before and after our intercourse. On the month of November, it's November 13, there's a huge spotting. It's brownish but it wet my underwear. I asked my sister which is a nurse and then she told me to just wait my real period to come. On the 2nd week of my delayed period, it's December 2, I had my pregnancy test and the result is negative. But I'm wondering. My period is delayed for almost 3 weeks now and yet, my period isn't coming. Help please,

I wouldn't be too worried. Sex can delay periods. Give it some time, if it's still a concern make an appointment with a doctor. I doubt your pregnant if you used a condom and he checked it and it was OK. And if you took a pregnancy test and it came out negative, I wouldn't worry too much. If your really nervous wait a while and take another test. But it's probably just a fluke. It happens to women, your not alone.