hey mrsH - congratulations! The test can't be 'wrong' per se, as it is picking up on levels of hcg which wouldn't be in your blood if you weren't actually pregnant. You can't really have a false positive.
As for cp - well, lots of women test a few days early and are absolutely fine and have successful pregnancies. People even have bleeds and successful pregnancies. You just have to keep hoping that you're one of the lucky ones!