SOS...pregnancy tests...

Elizabeth
Hey gals! I need some assistance. My boyfriend and myself were doing the deed and well, we had a bit of an accident. It happened only a week ago, so I know I'm not gonna get results this quick, but any recommendations on which pregnancy tests are the best/most sensitive? I just really need to know. I'm a heavy chain smoker, and if I'm pregnant, I don't wanna hurt my little one. SOS...