I lost my virginity a week ago, and now I am having pregnancy symptoms.?

About six days ago, my boyfriend and myself had sex. The most stupid part about it all is that we didn't use protection... He used the "pull-out" method. Well, lately I have been having symptoms that I looked up on some internet sites, that say what should happen during the first and second week of pregnancy. I have cramping in the lower part of my stomach, a little bit of nausea, headaches, dizziness, fatigue, and when I go to the bathroom it stings. Also, my lower abdomen is in a way harder than usual... like when I press on it, its like a wall of rock (and i'm not toned). I also am having backaches. Also, I have no idea if I am missing my period, because mine is irregular, sometimes it doesn't come for a month or more. Are these signs of pregnancy? What should I do? (Don't say a home pregnancy test) haha. I'm going to the gynecologist on the 28th for my irregular period anyways.