Wow chill the fuck out, you can be clean 3 days after smoking with some water and cranberry pills. That's beside the point, your doctor can't tell anyone, mine knows I smoke weed. You need to not be so fucking paranoid, it's fucking with the energy in here.
Bro, if anyone brought some negative vibes in it was you with that post. I agree with what you are saying though, chances are they won't even test for THC, and even if for some VERY odd reason (Which they would make you consent too first) they do then I'm pretty sure it would be confidential. Just do whatever you see fit, it's not any of our lives, its yours so act accordingly.
I'm bowing out now, because I can't talk about any area but the one I grew up in. I know ours tested for drugs, but that was also 15 years ago in the starting fervor of 'Zero Tolerance' policy. But then again, I also think our local school district was a huge joke....I would call it a pile of shit, but I'd hate to insult the dungpile.