well ur kinda too late to try and exercise so the day of.. i dont know wat it is u have to do in the time before the test but definitely definitely try n make time to eat a lot and pee as many times as u can! however you can't drink too too much or ur pee will definitely be diluted! also i dont think i have to say it but definitely stop till friday! and dont do it after the test until u hear bout the results in case u do end up having to take the test again.. good luck