ruhroh

Hello,
I just found out today that I have a urine drug test tomorrow for my possible internship, the bad news is that the last time i smoked will be exactly 30 days from tomorrow. I was never a heavy smoker, usually only on weekends and not a crazy abundance. I smoked pretty normal weed, nothing great nothing super potent that you see now of days. My metabolism seems good, I am 6 feet tall 165 lbs and I cant seem to gain weight really if i try. I workout occasionally and play sports every now and then, always walking a lot during the days. I just am nervous because its my first drug test and I have to go to the lab tomorrow, so any support or help would be appreciated. I have upped my water intake for yesterday and today by an immense amount just to give me some added piece of mind, but any other information or advice would be great. Thanks!