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Had to get T at school this morning.  He was only there for 15 minutes.  Said he felt like he was tripping (he was kidding and laughed).  I told him that it was not apropriate to joke about something like that.  Anyway,  he said he broke out in a sweat, was dizzy, and had a headache and just wanted to lay down for awhile and will go back to school for his next class.  I don't know how truthful he was about not feeling well - being that he hates math, is forced to attend even though he's failing in it.  T may not be obviously using but I know he was drinking last Saturday to some degree.  Saw a conversation on-line about it.  He did come home on time, seemed okay, but I did notice he was chewing gum.  He doesn't know I know.  I do know that he knows that I monitor his instant messaging.  Sometimes he must forget.  He also IM'ed his drug dealing friend and asked him if he has any white.  That could mean any number of things, I guess, but he is continuing to test clean.