your right about being able to get clean in a couple days if you only smoked once after your completly clean, but i think it also depends on how much u smoke, i read somethin on erowid were they had some guy smoke 2 bowls and they tested him frequently, and he was clean in 48 hrs, but u smoked an 8th so it might be a lil longer, if your parnets want to test u, i would jus say u dont have to go, then drink as much water as u can until then, also in the time until the test if you even get tested, drink juices, not water casue water will jus go right through you, water is good the day of the test but it wont clean out ur system it will jus dilute ur piss. I don't know wut ur situation is, but it sounds like mine is sort of the same, and i blazed for the first time in months last sunday and got tested when i got home, i didnt smoke very much, and i downed like 6 bottles of water b4 the test, since its been a couple days i think i'm ok, but i'm still not sure if the results are in yet.