Prego?

I've taken 2 tests in the past month or so. I see no faint lines or anything like that. My last period ended January 6th, and I really hope I'm not syking myself out because I want to get pregnant. I realize I should go to the  doctor but it's been a week since I last tested. Should I just try a test again, and has anyone Sykes themselves out before about being pregnant. I just want it so bad, that I think I may be playing with my own head...