DVD, HD DVD & Blu-ray 2.1-1

My last cycle started 12/9/06..about seven days after I was clear, my best friend and I had sex (yeah, i kno) anyway, the condom broke! I was walking around paranoid about it ever since then, and he kept tryna get me 2 calm down. But even tho he pulled out right away, i know there is a possibility that sperm still could have gotten in. I still started my cycle in time since then, but a friend of mine tol me that her mother, who is a nurse, said that even if you do start ur period on time, there is a chance that u still could be pregnant, especially after losing or gaining appetite and sleeping 2 much..i only had one slight case of nausea, but i think that's because i've been nervous.. (was my first time so of course i'm paranoid)..but isn't it kinda early 2 b experiencing those symptoms?..my best friend, well he said i have 2 relax..and i think i need 2 relax 2 because i've really been trippin about it.. but it's still a scary feeling! Can any1 help?