How soon can I know I'm pregnant?

I had sex with my boyfriend twice in the past 2 weeks, once last tuesday and once this monday. Both times were unprotected, but he "pulled out" before any sperm came out. But I've been hearing how if you dont do it rite the pre-c*m can get you pregnant....

I checked online to see my ovulation cycle and the first time we had sex I wasnt fertile yet, I had another 2 days. But studies show that sperm can stay in a womans body for EXACTLY 2 days. and the second time we had sex, I was fertile. So I have been wondering how soon I can take a pg. test, or what are some early symptoms? Because my period isnt for another 2 weeks, and I dont think I can wait that long! So anyone who can help, PLEEEASE HELP!!! FAST!!! =]
Thanks!

A WEEK