Drug test and a wierd situation... Need advice on this?

So a while back I had pretty much dug my life into a hole and I thought it couldn't get any worse. Of course at 18 years of age I thought I was invincible and I was the most irresponsible little **** you could imagine. I finally ended up topping it all off with a freaking DUI. Now half a year later I did what I never thought would happen. I completely changed everything in my life around. I have my license back, my car back, my ged, and I'm a freshman in college. Life is great. I have nothing to worry about anymore and couldn't be happier. The DUI is not on my record but it is literally torturing me beyond anything I have ever been through. All the way to the point where it's interfering with my college which is very frustrating. I have to take a drug test every month. I cannot pee for anything with these people hovering over me and watching me. I am completely clean but I cannot pee. If they leave the room I can pee fine. If there in there I can't. *Additional details*