negative/positive blood tests (no numbers)

i’m 3 days late so i got blood test done but decided not to wait the full day for numbers, so they said they’d tell me yes or no within the hour, 30 minutes later they gave me the results & it was negative?? i’ve never been late before in life, do y’all think it would’ve been better to wait for numbers? or maybe the tests were too early to tell. y’all think it’s just too early or am i just late for no reason.