Well, ya. You had sex in the fertile time period (even though you can also get pregnant any time during your cycle). But it is way too soon to know anything. You'll have to wait until your next period is due. You can get a positive 2.5 weeks after the unprotected sex. Let us know how it turns out.
Hm, well, if you had unprotected sex, then yes, you could be pregnant. I'm not sure where you were at on your cycle. What day did you start your last period?