Deanna-
i feel the same as the other girls.
Although it is probably 50/50 that you are pregnant, you may want to treat yourself as if you are, by making sure that your hobbies, habits, and lifestyle, would be okay during the first month of pregnancy.
I am definately not saying that you are. All i'm stating is that it is a possibility. You wouldn't want to do something now that could potentialy harm the unborn baby, if indeed you happen to be pregnant. So if you miss you next period, I suggest you take a home pregnancy test and then go from there.
Good luck- hope I helped!
Marissa