Ok im not proud of this but last weekend I took some mcat at a house party. mcat is basically like speed if you dont know and is a class b ilegal drug. I was stupid and dont usually go near drugs but i was drunk and allowed myself to join in with everyone else who was doing it. Thing is i've got my medical next week and im now worried it will show up on drugs test. Should I come clean now and tell my recruituiting officer what ive done or shall i just go along and hope its out my system by then. I know its wrong but it was a mistake and i don't wanna mess up my chance of joining.