Do you think i ped?

I smoked 1 blunt of haze 24 days before the test....but prior to smoking that day I was clean. After taking the test I went home thinking I failed so I went and got a first check a t home drug test and it was negative.......now I don't know if I ped with the real test........I don't know how accurate those at home test......can anyone help me out thank you!!!!!