Drug and alcohol test?

Alright so i got in trouble i was sent to a drug and alcohol class i get tested 1 every 2 weeks i stopped smoking weed but i drank 2 days before the test i drank a lot of water the next day i was wondering if im gonna fail haha i might not be tested for alcohol i have no clue but i was wondering if it is still in my pee i am skinny...i donno if that helps hah but yeah i dont care what you think or if you think im dumb for drinking before a test i just wanna know if im screwed. thanks