Has any one had the issue of taking a pee test and it come out negative but taking a blood test and it come out positive? I just wanna know if im not the only one. My first son he only showed up on a blood test. My period is 4 days late and im having every symtom, but negative pee test. I go for my blood test tomorrow, and garantee its going to be positive because thats what happened with my son.