I got my period the same day I had sex... can I still be pregenant?? :o

More than likely not. Ovulation typically happens 12-14 days before your next period begins. If you are pregnant you would have to wait until you miss your next period, but it's unlikely that you are. Make sure you are using protection. The only way to be certain not to get pregnant is to not have sex.

I would say most likely, no. I think it might technically be possible, but the odds are probably against it here. If you are late for your next period, then take a pregnancy test. Make sure to use protection, if you don't want to become pregnant. If you are very worried, you might go to the doctor and see how soon they can do an accurate pregnancy test.